The main purpose of this ongoing blog will be to track planetary extreme, or record temperatures related to climate change. Any reports I see of ETs will be listed below the main topic of the day. I’ll refer to extreme or record temperatures as ETs (not extraterrestrials).😉
Main Topic: Canada, the U.K. and the Planet Has Its Hottest June on Record
Dear Diary. Over the last month we have seen some shocking records being set around the globe. Heat domes causing these records are now widespread and appear to be becoming hotter with each passing year. So, it comes as no surprise that I learned last night that Canada had its warmest June on record due to heat domes setting up over that country:
After experiencing their warmest May on record, Canada just had their warmest June on record. Combined, of course, it was the warmest May-June on record. A big spot of record warmth covered half the country for the 2-month period. 🇨🇦 pic.twitter.com/myJBnF0B0A
— Brian Brettschneider (@Climatologist49) July 5, 2023
That heat is extending now into July:
On a map, here are some of the impressive heat records that were set today in Canada. All-time records for Kuujjuaq (since 1947), Rivière aux Feuilles (since 2006), and Inuvik (since 1957).
— Patrick Duplessis (@Pat_wx) July 5, 2023
Heat continues tmrw in QC, but shifted a bit to the southeast. #wxtwitter #meteoqc pic.twitter.com/HK4LPmf0sj
Historic day in Northern Canada.
— Extreme Temperatures Around The World (@extremetemps) July 4, 2023
All time records were broken in Quebec, the most important is 34.3C at Kuujjuaq with a long POR.
The heat was exceptional also in the Northwest:
Inuvik (lat. 68N) rose to 32.5C,only 0.3C from its all time high.
It will "try" it again on Friday ! https://t.co/JdHSZM3O8o
The far reaches of Northern Quebec in Kuujjuaq near the Arctic Ocean reached a new all-time record high of 93. This beats Miami’s high of 92 yesterday. https://t.co/iFRto4cRXg pic.twitter.com/yP5x3vMjuo
— Jeff Berardelli (@WeatherProf) July 5, 2023
Will the United States follow suite? Despite seeing a torrid heat episode across the south-central states, which I dubbed Heatwave British Petroleum, the U.S. during June has been under what meteorologists call an Omega Block (an upper air jet pattern shaped like the Greek letter Omega):

Canada has been under the ridge or heat dome of this pattern while across the West and East we saw cool troughs:
Another below normal temperature month for the Lower 48 USA.
— Ryan Maue (@RyanMaue) July 1, 2023
-0.40°F compared to 1991-2020 average.
It's fairly easy to pick out the omega blocking pattern even from monthly mean temperature anomaly. pic.twitter.com/3xjuhjqfJ5
At some point this overall pattern will break down across North America. When it does Canada will get cooler while the United States will get quite toasty, particularly if the flip occurs before September 1st.
Across the pond the United Kingdom and Ireland also had their warmest Junes on record:
June 2023 in the United Kingdom was also a record month:
— Extreme Temperatures Around The World (@extremetemps) July 4, 2023
Average temperature of 15.8C is 2.5C above normal and the highest on records, 0.9C higher than previous hottest June 1976.
It was very sunny and dry.
Temperatures and rainfalls anomalies map below by Uk Met Office. pic.twitter.com/9dUt9CGSDr
June 2023 in #Ireland was exceptionally warm:
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
With a temperature anomaly of +2.64C vs 1981-2010 (about +2.3C 1991-2020) it was the warmest June on records, beating June 1940.
It was also mostly drier than average with 20/30% deficits. https://t.co/yrOxeXnpRL
Western Europe has mostly been under a strong heat dome during June, which has been part and parcel to our overall warming trend from carbon pollution.
What about the planet overall in June? Due to warm water temperatures getting averaged in from our burgeoning El Niño, I’m getting wind that June 2023 was the warmest June on record globally:
Holy whoa. I'll be shocked if an anomaly this big doesn't also show up as the warmest global June on record for NOAA, NASA, etc. (NOAA's report is due out on Thurs 7/13.) https://t.co/JGSTeM4pba
— Bob Henson (@bhensonweather) July 3, 2023
Here are some “ET’s” recorded from around the planet the last couple of days, their consequences, and some extreme temperature outlooks, as well as any extreme precipitation reports: temperature outlooks, as well as any extreme precipitation reports:
Confidence is increasing for a long duration heat wave across the Southwest and western Texas through at least July 17thhttps://t.co/1N4GaHhqwK pic.twitter.com/YJpgefpTGU
— NWS Climate Prediction Center (@NWSCPC) July 5, 2023
SEW issues Record Event Report (RER) at Jul 5, 8:05 PM PDT …RECORD HIGH TEMPERATURE SET AT SEATTLE-TACOMA WA AIRPORT… https://t.co/Rgyy8H0pRV
— NWS Record Event Reports (@iembot_rer) July 6, 2023
EPZ issues Record Event Report (RER) at Jul 5, 5:49 PM MDT …RECORD HIGH TEMPERATURE SET AT EL PASO… https://t.co/AQtqijwv0X
— NWS Record Event Reports (@iembot_rer) July 5, 2023
TBW issues Record Event Report (RER) at Jul 5, 5:15 PM EDT …RECORD HIGH TEMPERATURE SET AT RUSKIN WFO… https://t.co/at6npoj2gc
— NWS Record Event Reports (@iembot_rer) July 5, 2023
TBW issues Record Event Report (RER) at Jul 5, 5:15 PM EDT …RECORD HIGH TEMPERATURE SET AT SARASOTA BRADENTON… https://t.co/eghQCmyF8r
— NWS Record Event Reports (@iembot_rer) July 5, 2023
UNR issues Record Event Report (RER) at Jul 5, 2:45 AM MDT …RECORD LOW DAILY MAXIMUM TEMPERATURE SET AT RAPID CITY AIRPORT SD… https://t.co/09tC6bLamC
— NWS Record Event Reports (@iembot_rer) July 5, 2023
BYZ issues Record Event Report (RER) at Jul 5, 6:21 AM MDT …RECORD LOW MAXIMUM TEMPERATURE SET AT SHERIDAN WY YESTERDAY AND A RECORD LOW TEMPERATURE SET AT MILES CITY TODAY… https://t.co/cgLZIaHKJB
— NWS Record Event Reports (@iembot_rer) July 5, 2023
In China it's starting one of the worst heat waves in its history.
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
Today widespread temperatures over 40C, including in the capital Beijing,as high as 43.7C in Xinajang.
Next days the heat will be extreme in a very huge area with temperatures reaching near 45C even in humid areas https://t.co/fZvlgzfvd6
Record heat is near allover these days and Philippines is not an exception:
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
Today Metro Manila rose to 37.0C ,its hottest day in July in climatic history. https://t.co/OkG2BYxIF0
Never ending record heat in Australia:
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
Every day records have been falling for weeks and today 5 July is not an exception.
Records for rainfall and Highest Min. temperatures for July were set in Queensland.
See table of records below courtesy of Australian Weather News: pic.twitter.com/t1StgD7UXl
Just incredible warmth in South America where it 's supposed to be winter and temperatures look like summer in many areas.
— Extreme Temperatures Around The World (@extremetemps) July 4, 2023
Over 30C in Central Argentina and Chile,record warmth also in Peru with over 27C in Lima-La Molina, hottest June day on records.
Abnormal warmth will go on.. pic.twitter.com/dR6FJvVQeE
https://t.co/2cUVeJnLpq
— Peter Sinclair (@PeterWSinclair) July 5, 2023
Chicago seeing #Climate Whiplash. Drought, water shortage, flooding and sewage overflow. pic.twitter.com/LrRRP4QX3z
Ensemble guidance shows a growing probability of a ridge with 500mb heights above 600 dam developing over NW Africa into Spain and retrograding westward next week.
— Tomer Burg (@burgwx) July 5, 2023
Such a ridge would break max 500mb height records (1950-2021) & produce excessive heat in NW Africa & Spain. pic.twitter.com/P6A9bci2hS
Hot temperatures will continue through the next several days across the region with highs across many of the lower desert areas approaching/exceeding 110°F. Even hotter temperatures are forecast by next week when highs could potentially approach/exceed 115°F degrees!#azwx #cawx pic.twitter.com/pUt6XfkDmS
— NWS Phoenix (@NWSPhoenix) July 5, 2023
Here is some new June 2023 climatology:
June 2023 in #Poland had a temperature anomaly of +0.88C vs 1991-2020 ranging from slightly below average in the Southeast (up to -0.39C) to +1.87C in the North.
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
See temperature anomalies map by @PogodaMeteo pic.twitter.com/dxe5e1aZp5
June 2023 in #Romania was slightly colder than average with anomalies between -1C and +0.5C above average (left map).
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
It was rainy in the West and dry in the East (right map).
Maps by Meteo Romania. pic.twitter.com/9UKWtmHKdK
June 2023 in #Bulgaria was slightly colder than average;mostly colder in the West and slightly warmer in the Northeast. (left map)
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
It was very rainy in the West and dry in the East (right map).
Maps are courtesy of Meteo Bulgaria. pic.twitter.com/2t4hUYlCla
June 2023 in #Latvia was warm and very dry:
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
Average temperature was 16.6C, +1.4C above normal .
The total amount of precipitation was 23.4 mm, which is 67% below the monthly norm (70.1 mm).
See temperatures (left) and precipitations (right) anomalies maps by Latvia Met. Service. pic.twitter.com/swDQc6kBk8
June 2023 in #Estonia was also very dry:
— Extreme Temperatures Around The World (@extremetemps) July 5, 2023
Average temperature was 16.5C, +1.7C above normal.
Average rainfall was 28mm (average is 70mm), for some areas including the capital Tallin it was the driest June on records. pic.twitter.com/YSk4xslCDJ
Here is more climate and weather news from Wednesday:
(As usual, this will be a fluid post in which more information gets added during the day as it crosses my radar, crediting all who have put it on-line. Items will be archived on this site for posterity. In most instances click on the pictures of each tweet to see each article. The most noteworthy items will be listed first.)
“Some scientists believe July 4 may have been one of the hottest days on Earth in 125,000 years, due to a dangerous combination of climate change, the return of the El Niño pattern and the start of summer in the northern hemisphere.” https://t.co/2pgq8cvoiI
— Dr. Lucky Tran (@luckytran) July 5, 2023
We just had Earth's hottest day ever recorded. @RARohde “It’s not a record to celebrate & it won’t be a record for long, with northern hemisphere summer still mostly ahead & El Niño developing." said @FrediOtto. … we have to stop burning #FossilFuels." https://t.co/xxVcCEnPAN
— Susan Joy Hassol, Climate Communication (@ClimateComms) July 5, 2023
Every year will get hotter and hotter
— GO GREEN (@ECOWARRIORSS) July 5, 2023
'Terrifying': Tuesday Was Hottest Day Ever, Breaking Record Set Just 24 Hours Earlier and likely even hotter today
global average temperature peaked at a new all-time high of 17.18°C
Millions at risk from intense heat https://t.co/nfUmSrDBcZ
Earth has a fever like never before – end result will expunge us from the planet
— GO GREEN (@ECOWARRIORSS) July 5, 2023
TWO hottest days ever recorded on Earth
Antarctica average that whopping 4.5 degrees C (8.1 degrees Fahrenheit) warmer than the 1979-2000 average.
Baltic sea 8°C above normal https://t.co/iSwTPeaQnY
4th Of July May Have Been Earth’s Hottest Day On Record – Here’s The ‘So What?’ via @forbes https://t.co/YhzJrB4TbM
— Dr. Marshall Shepherd (@DrShepherd2013) July 5, 2023
Monday, July 3rd was the hottest day ever recorded on Planet Earth. A record that lasted until……
— Bill McGuire (@ProfBillMcGuire) July 5, 2023
…..Tuesday, July 4th.
Totally unprecedented and terrifying. pic.twitter.com/s2f5u46lyG
📈 According to preliminary data from the #ERA5 dataset, the global average 2m #temperature reached 16.88°C on Monday, breaking the previous record of 16.80°C from August 2016.
— Copernicus ECMWF (@CopernicusECMWF) July 5, 2023
Get the data 👉 https://t.co/V3rirrGxRD#Climate #ClimateChange pic.twitter.com/gwVEYxfPok
Let's be clear.
— Dr Paul Dorfman (@dorfman_p) July 5, 2023
The only tech that is economic enough, quick enough, practical enough is renewables-plus.
Nuclear just too slow and costly.
Up to 20 years for just one nuclear plant.#renewables #ClimateActionNow #ClimateEmergency #ClimateCrisis https://t.co/V59B07uaut
On Monday, the global average temperature was the highest it’s ever been. It was even hotter on Tuesday.
— Jeff Goodell (@jeffgoodell) July 5, 2023
“It's a death sentence for people and ecosystems,” says @FrediOtto.
https://t.co/zeIsAy72Le
Thank you all for sharing this.
— Leon Simons (@LeonSimons8) July 5, 2023
I truly believe that very many people are willing and able to understand the basic physics of our rapidly warming planet.
The million views of this tweet strengthen this belief. https://t.co/NWlDto8yWF
Carbon dioxide (CO₂) averaged 423.68 ppm in June 2023
— Zack Labe (@ZLabe) July 5, 2023
10 years ago June averaged about 399 ppm
+ Preliminary data (@NOAA_ESRL): https://t.co/81JQavZo7r pic.twitter.com/jxfuPOuM39
The North Atlantic Sea Surface Temperature Anomaly is still 0.25°C higher than in any preceding year.
— Leon Simons (@LeonSimons8) July 5, 2023
In the past three years, the anomalies started to rapidly increase in July and August.
Is the worst yet to come for the North Atlantic Ocean? pic.twitter.com/sIco4Mxzx9
"An evenhanded take on a crucial topic. While our goose may not be cooked, it’s still time to reduce the heat" | Thanks @KirkusReviews for the wonderful review of #OurFragileMoment (releases Sep 26 via @public_affairs/@HachetteUS): https://t.co/Xd1DmvroRf
— Prof Michael E. Mann (@MichaelEMann) July 5, 2023
Launching today! A new database that tracks fossil fuel lobbyists and their other clients, including environmental groups, museums, cities, and universities.
— Jamie Henn (@jamieclimate) July 5, 2023
Some explosive stuff in here. https://t.co/T9lMPXAkc6
They have never been serious about climate. It’s always been a scam. This bares the truth. You can not trust them, period. https://t.co/CCpdSDrqQT
— Sheldon Whitehouse (@SenWhitehouse) July 5, 2023
Climate change spells 'terrifying' future
— Prof. Peter Strachan (@ProfStrachan) July 3, 2023
"#ClimateChange threatens to deliver a 'truly terrifying' dystopian future of hunger and suffering, the United Nations' human rights chief warns"#ClimateCrisis #ClimateEmergency
https://t.co/nONflzk6YM via @FRANCE24
#ClimateChange: Is drought Europe's next crisis?
— Prof. Peter Strachan (@ProfStrachan) July 5, 2023
"Europe has a water problem. Rising temperatures mean its snow is melting, rivers are dwindling, canals are drying up and punishing droughts persist."#ClimateCrisis #ClimateEmergency #ClimateActionNow
https://t.co/8P3RBbW1Fe
"Simultaneous harvest failures across major crop-producing regions are a threat to global food security."
— Prof. Steve Austin (@postcarbonsteve) July 5, 2023
simultaneous. crop. failures.
the 3 scariest words in the world right nowhttps://t.co/S5wIRI7gWL
It is winter.
— Laurie Garrett (@Laurie_Garrett) July 5, 2023
In #Antarctica .
And coastal temperatures are ABOVE freezing.
This is so beyond "normal," it's terrifying. https://t.co/7ce2qORm7M
So how long are we giving Thwaites? Remember it’s the size of Florida and would raise sea level by 3 feet if it melted – 10 feet if the ice it holds in place slid into the sea also. It’s not called doomsday glacier for nothing. pic.twitter.com/P48liAkKCs
— Peter Dynes (@PGDynes) July 5, 2023
What Would Make the Next UN Climate Conference #COP28 the First True “Health COP”?
— Global Climate and Health Alliance (@GCHAlliance) July 5, 2023
🧵👇@GCHAlliance opinionhttps://t.co/KlYWNRBylg pic.twitter.com/wnmW0gAeU7
🚨A reminder that the 1.5 C #ParisAgreement target is not optional – it is an extreme limit for humanity.
— Climate Crisis Advisory Group (@ClimateCrisisAG) July 5, 2023
📈There is no evidence we can handle anything beyond this red line.
➡️“Where we are today [at 1.35 C] looks exceptionally dangerous” – @Sir_David_King pic.twitter.com/OIJuqUDsdL
Its basic Physics
— GO GREEN (@ECOWARRIORSS) July 5, 2023
U cannot keep heating Earth like this and expect to survive very long as a species
"Tuesday’s temperature nearly a full degree Celsius (1.8 degrees Fahrenheit) warmer than 1979-2000 average, which is itself is warmer than the 20th and 19th century averages" pic.twitter.com/kSN7y2Zas4
Big Oil raked in record-breaking profits. The companies that caused the climate crisis are getting rich as they fuel the fire. @ExxonMobil: $55.7 billion@Shell: $39.87 billion@Chevron: $35.5 billion@BP_plc: $27.7 billion
— Mike Hudema (@MikeHudema) July 5, 2023
Time to make the pay for the damage they've caused. pic.twitter.com/Tx7QNng5Wr
Today’s News on Sustainable Energy:
Guess who's funding climate delay? YOU ARE! Through your utility bills.
— Dr. Leah Stokes (@leahstokes) July 5, 2023
It's time to hold utilities accountable so we can transition to clean power and electrify everything we can. Brilliant, must read from the great @DavidPomerantz.https://t.co/qX8tLtEg5i
“…Just a year after passage of the Inflation Reduction Act of 2022 (IRA), measurable drops in greenhouse gas emissions have occurred in the United States.”
— Secretary Jennifer Granholm (@SecGranholm) July 5, 2023
President Biden’s Investing in America agenda is working—for people, communities, and our planet.https://t.co/FnCllvYYI5
'It probably won’t shock you to learn the world’s net-zero pledges haven’t yet been followed by the hard cash, or even promises of hard cash, necessary to make them a reality.' https://t.co/8oBP87Ec4w pic.twitter.com/eUneI388xn
— Jake Reyna (@iJakeReyna) July 5, 2023
"The idea that it's a choice between our addiction to #FossilFuels or working by candlelight is a gross misrepresentation of reality, when we know #Renewables are cleaner, cheaper and better for public health," said Claire Fyson at Climate Analytics https://t.co/Qrwi4oilm1
— Prof. Peter Strachan (@ProfStrachan) July 6, 2023
— Dr Paul Dorfman (@dorfman_p) July 5, 2023
The public can power Britain to #NetZero | Letter
— Prof. Peter Strachan (@ProfStrachan) July 5, 2023
"The UK public consistently ranks #ClimateChange and the environment in the top four concerns facing the country"#ClimateCrisis #ClimateActionNow
https://t.co/NaOqAEZL7B
"A few years ago [before the rapid buildout of solar] there would have been a very high likelihood that you would have seen prices in the $1,000s/MWh… Renewables likely saved consumers a billion dollars or more last week alone." #txlege #energytwitter https://t.co/RkFv49ahfQ
— Doug Lewin (@douglewinenergy) July 5, 2023
Good morning with good news: Kansas has moved from 100% fossil fuel electricity generation in November 2003 to just 16% in April 2023. Twenty years to clean up. Iowa was even lower at 13% in April. Generation in KS, IA & VT was more than 80% non-fossil fuel in April. pic.twitter.com/NjWfXYMzas
— John Raymond Hanger (@johnrhanger) July 5, 2023
It may be out of sight, but fiberglass insulation should not be out of mind. A properly insulated home reduces energy costs by up to 20%.
— Knauf Insulation North America (@KnaufNA) March 24, 2022
It’s one home improvement project that can actually pay back more than the money spent on it.
See where to find Knauf Insulation near you.
One of the world's largest oil and gas companies, @bp_plc says clean hydrogen will play a minimal role in the decarbonisation of cars and space heating.
— Dr Jan Rosenow (@janrosenow) July 5, 2023
BP points to electrification instead.https://t.co/far09WdNbh
More Environmental Stuff:
Let me repeat this. Urgent action needed to cut pollution or more people will die, WHO warns https://t.co/gYk9H5HD13
— Dr Maria Neira (@DrMariaNeira) July 4, 2023
UK risks ‘shattering’ global standing by dumping £11.6bn climate pledge https://t.co/bR0nfqHkjC
— Guardian Environment (@guardianeco) July 5, 2023
Humans kill other species, merely to do so — kill them. Not eat them, not to protect ourselves. Just for the "joy" or "convenience" of it. Because they were there.https://t.co/vGANPE3j8K pic.twitter.com/vOXpNb16nB
— Laurie Garrett (@Laurie_Garrett) July 5, 2023
After years of decline, the North Pacific’s gray whales may finally be headed for recovery, officials say.
— Yale Environment 360 (@YaleE360) July 5, 2023
Read more @YaleE360: https://t.co/9Pt7CMRbsY pic.twitter.com/v7j63aDkZc
And from the Weather Department:
An exceptionally strong summer cyclone — called #StormPoly has produced winds over 90 mph in the Netherlands; it is blamed for at least 2 deaths. https://t.co/B4aOGejo3V
— Capital Weather Gang (@capitalweather) July 5, 2023
A potent windstorm, known locally as Poly, turned deadly in parts of the Netherlands and Germany on Wednesday. https://t.co/xdwWKFm7sk pic.twitter.com/KpGVFzVNj7
— Breaking Weather by AccuWeather (@breakingweather) July 5, 2023
12:29pm CDT #SPC Day2 Outlook Enhanced Risk: across eastern Colorado into Western Kansas and far northwest Oklahoma https://t.co/Y1WiOd8TQQ pic.twitter.com/wwnNX6h8F1
— NWS Storm Prediction Center (@NWSSPC) July 5, 2023
Despite an aggressive El Nino forecast, ECMWF continues to predict a very active Atlantic #hurricane season with a best estimate of ~17 named storms and ~9 hurricanes forming from August 1st through the rest of the season. pic.twitter.com/dXfvD2vdDg
— Philip Klotzbach (@philklotzbach) July 5, 2023
Where would you rather be? 🤔
— The Weather Channel (@weatherchannel) July 5, 2023
Get a peek at your city's summer temperatures LIVE on air today! pic.twitter.com/QDlF9vxOK7
First third of July is tracking closer to 10-year normal for U.S. cooling demand, which is hotter than expected, but cooler than last year's big West to Texas drought-enhanced heat. pic.twitter.com/ltJJKaNVBp
— Commodity Wx Group (@commoditywx) July 5, 2023
First true plume of Saharan Dust rolling across the Atlantic over the next 7 days.
— Scot Pilié (@ScotPilie_Wx) July 5, 2023
Likely to reach sections of #Florida & the Gulf Coast this weekend.
Suppressed tropical activity, slight haze to the sky, allergy uptick for those with respiratory issues. @weatherchannel pic.twitter.com/LtFKIEmgF1
The 2023 Hurricane Season… so far. https://t.co/Hk3pbO84Yf pic.twitter.com/m1NbekgcoS
— Mike's Weather Page (@tropicalupdate) July 5, 2023
More on other science and the beauty of Earth and this universe:
“Open Philanthropy alone has funneled nearly half a billion dollars into developing a pipeline of talent to fight rogue AI, building a scaffolding of think tanks, YouTube channels, prize competitions, grants, research funding and scholarships…” https://t.co/0qAEaSJ8nc
— David Wallace-Wells (@dwallacewells) July 5, 2023
Ubinas in Peru yesterday 👀pic.twitter.com/1mTKHWPslT
— Volcaholic 🇰🇪 🇬🇧 🌋 (@volcaholic1) July 5, 2023
Night thoughts
— Green is a mission (@Greenisamissio1) July 5, 2023
Forests, guarantor for
-clean, oxygen-rich air
-CO2 storage
-biological diversity
-water purification and regulation
-lowering of temperatures
-windbreakers
-enrichment of healthy soil
-Medicine for our body and mind💚🌿🌱☘️🌳🌲🍀💚 pic.twitter.com/9brAPUqL6j
Hello. If there is vastly increased volcanic activity, the following prediction will be delayed. What? A rise of 7 to 9 degrees celsius in temperatures on Earth. After that, still continue to rise also. There is no technical means to stop this, I think. The first and key event would be the rapid melting of all ice at both poles. No ice anywhere on the planet. This accomplished by the release of copious amounts of methane. This process would surely be complete in thirty years? Yet the loss of ozone may be more of a problem.