Extreme Temperature Diary- Thursday July 16th, 2026/Main Topic: Heatwave ConocoPhillips Produces Unhealthy Smoke Across Southern Canada and the Northern U.S.

🔴 ⚠️ 🔥 🛰️ A tremendous #wildfire outbreak started in #Ontario on July 14, with more than 160 #wildfires and a huge smoke plume that will reach the East Coast in the next few days⬇️ #Sentinel2 📸 on July 14,130km wide,where the largest fire is 430km2 #Canada� #climateemergency

Antonio Vecoli (@tonyveco on X) (@tonyveco.bsky.social) 2026-07-15T20:37:48.414Z

830 wildfires burning across Canada right now. And you know what’s going to make it worse in the future? More oil pipelines. This is why our voice and our vote matters.

Katharine Hayhoe (@katharinehayhoe.com) 2026-07-15T15:23:26.499Z

3/ When wildfire smoke occurs during heatwaves in areas where a portion of the population doesn't have access to air conditioning, people face the dilemma of opening their windows to avoid heatstroke, but searing their lungs with smoke. Smoke + heat can become even deadlier than either alone.

Jonathan Vigh (@skywatcher77.bsky.social) 2026-07-15T00:40:12.515Z

Today the Air Quality Index (AQI) briefly hit 2000 at Sea Gull Lake MN, near a 🔥 The AQI scale stops at 500. So, that’s 4X the peak of the EPA AQI scale! At what point is it safer to just stop breathing, than breath this #smoke 💨 in? #fire Thanks SatWorld for the image left. H/T Dr Jeff Masters

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-16T16:40:28.914Z

Where is 1600 on this scale? Exactly!

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-16T15:44:05.813Z

Wildfire smoke will worsen in the Northeast and Mid-Atlantic through Friday – The Washington Post

Wildfire smoke will worsen in the Northeast and Mid-Atlantic through Friday

More than 115 million people could be exposed to unhealthy air quality. See the forecast for 20 cities.


By Ben Noll

Dangerous wildfire smoke is filling the skies from the Midwest to the Mid-Atlantic.

And in some areas, conditions are expected to worsen.

Through Friday, more than 115 million people are forecast to be exposed to air quality levels that are unhealthy or worse as winds funnel smoke south from out-of-control fires in Canada and Minnesota — and a heat dome traps that smoke near the ground.

From late Wednesday into early Thursday, Chicago, Detroit, Minneapolis and New York had some of the worst air quality of the world’s major cities, according to data from IQAir. In Detroit, the air quality index reached a value of 728 late Wednesday, far worse than the peak of 465 in New York during the apocalyptic June 2023 fires.

The smoke drifted into Philadelphia and Wilmington, Delaware, during the early hours of Thursday morning and was tracking southward along a path that roughly followed Interstate 95.

However, shifting winds closer to Baltimore and D.C. may keep the worst of the smoke out for most of the day Thursday — but not Thursday night. That’s when unhealthy air quality levels are forecast to abruptly develop, as the smoke plume accelerates south, engulfing much of Virginia and parts of North Carolina — conditions that are forecast to last through Friday night.

Meanwhile, a second strong smoke plume is also forecast to waft toward New York and Boston on Thursday afternoon and evening, with the New York City Emergency Management Office warning that “this could become the most significant smoke event in New York City since 2023, and conditions will be closely monitored for any deterioration.”

The city is making free KN95 masks available at all police precincts and public library branches across the five boroughs.

Farther north and west, air quality reached hazardous levels — the worst on the scale — in parts of northern Minnesota, Michigan and northern Wisconsin on Wednesday. These dangerous conditions show no signs of abating on Thursday, although a wind shift on Friday could cause some brief improvements before more smoke may pour south from Canada over the weekend.

Lowest air quality levels predicted through 2 a.m. Saturday

Air quality index levels

CategoryValueRisk
Hazardous301+Health warning of emergency conditions
Very unhealthy201 to 300The risk of health effects is increased for all
Unhealthy151 to 200Members of the general public may experience health effects
Unhealthy for sensitive groups101 to 150Sensitive groups may experience health effects
Moderate51 to 100Risk for people unusually sensitive to air pollution

Source: EPA

It is recommended that, when possible, you avoid strenuous outdoor activities, especially those with heart disease and respiratory conditions like asthma,” the Michigan Department of Environment, Great Lakes, and Energy wrote in a statement Wednesday.

“Keep windows closed overnight to prevent smoke from getting indoors and, if possible, run central air conditioning with MERV-13 or higher rated filters,” the department said.

When will the smokey skies clear?

In New England and the Northeast, dense smoke is forecast to clear on Friday. In the Mid-Atlantic, that clearing may not occur until Saturday, when increasing winds and rain may briefly blow away and dampen the smoke.

Changing winds again on Sunday could usher smoke back into the Northeast, although its intensity is uncertain. That’s when the World Cup final is scheduled to begin, at 3 p.m. in East Rutherford, New Jersey.

Some rain on Friday in the areas where fires are burning could bring short-lived decreases to smoke concentrations, but dry weather will follow for the weekend, possibly allowing them to grow once more.

More passing rain is forecast across Ontario on Monday, but sustained wet weather is not expected across the province where around 20 large and out-of-control fires are burning.

The largest fire, about 150 miles north of Lake Superior in the remote Wabakimi Provincial Park, has exploded in size to more than 867,000 acres.

NOAA satellite tracking wildfires experiences ‘anomaly’

On Wednesday afternoon, a National Oceanic and Atmospheric Administration satellite, GOES-19, which provides real-time imagery of conditions across North and South America and the Atlantic Ocean, experienced an ”anomaly” and stopped transmitting data.

NOAA wrote that engineers were working to recover the satellite and that a timeline would be provided when available.

At the time it went down, the satellite was providing imagery that helped with tracking of wildfire smoke.

Another NOAA satellite, called GOES-18, is still capturing wildfire activity, but its view isn’t as central to the fires as that of GOES-19.

About this story

The forecast low-level smoke concentration data used in this story comes from NOAA’s High-Resolution Rapid Refresh model. That forecast smoke data was translated into air quality categories defined by the EPA using the thresholds described here.

By Ben Noll Ben Noll is a meteorologist passionate about explaining the why behind the weather, extreme events and climate trends. He has expertise in data analysis, supercomputer-driven graphics and forecasting weather worldwide. follow on X@BenNollWeather

Increased emissions from wildfires in the past decade have reversed earlier progress made in decreasing US surface-level ozone pollution, a new analysis finds.

Physics Today (@physicstoday.aip.org) 2026-07-14T14:16:01.575657314Z

Admirable job by what must be @eaterofsun.bsky.social bringing together the ongoing mystery of the surge in absorbed sunlight on Earth. CERES, pattern effects, ECS — oh my.

Paul Voosen (@voosen.me) 2026-07-15T21:35:03.426Z

Mentioned in my piece on the new @nationalacademies.org report on climate change & extreme weather: michaelmann.net/comments-on-…

Michael E. Mann (@michaelemann.bsky.social) 2026-07-16T16:55:40.980Z

One of the planet's strongest heat domes is descending on the East Coast, & @michaelemann.bsky.social, leading climate scientist, tells @jimacosta.bsky.social exactly why this keeps happening. Mann warns that heat domes have nearly tripled in the last 50 yrs – driven by human-caused warming

Richard Power (@wyrdsofpower.bsky.social) 2026-07-16T07:52:56.148Z

“Limiting global warming to 1.5 °C above the preindustrial level can reduce smoke-related mortality in the United States by 11,600 each year compared to 3 °C. We estimate that every ton of CO2 emitted leads to damage of $11.2 from smoke-related mortality in the United States.”

Dr. Jeff Masters (@drjeffmasters.bsky.social) 2026-07-16T02:23:16.682Z

As millions of Americans prepare for another brutal heatwave, it’s now harder to find information about ways to stay cool while saving energy and keeping utility costs down.At least 1,662 Department of Energy webpages with guidance on protecting the electrical grid during heatwaves have gone dark.

Guardian US (@us.theguardian.com) 2026-07-15T15:24:23.987Z

Speaking out matters. #HowWeSpeakOut“This invisible-majority problem doesn't just keep individuals quiet— a recent study found that it misleads leaders, too.”Take inspiration from @katharinehayhoe.com and let others know you are concerned about climate change.www.patreon.com/TalkingClima…

The Green Runners (@thegreenrunners.bsky.social) 2026-07-16T06:08:20.833Z

Democrats have stopped talking about climate. Strategists say that's smart—but they're wrong.Making climate a top priority wins votes, and barely 1 in 10 voters will vote against climate action. Read all about it in my newsletter, "Notes from the Electric Era."electricnotes.news/p/yes-democr…

Leah Stokes (@leahstokes.bsky.social) 2026-07-16T14:53:22.625Z

Last-Ever Global Warming Report Released For Posterity

The Onion (@theonion.com) 2026-07-15T17:02:03.348301875Z

It’s crazy that the same area had a 1000 yr rain last July. I don’t think a 1000 years has passed (although now-a-days every year feels like a 1000 years 😢)A 1000 yr means it has a 1-in-1000 chance of occurring in any given year, but our now warmer climate makes it that much more common.

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-16T16:22:05.438Z

A not-so-good-morning from Detroit, the most polluted city in the world! The sun is a dystopian orange, and we've had AQI in the brown "Hazardous" range since 11 pm. Forecast: Hazardous through Friday night, clearing out Saturday morning, then a new wave of hazardous air Sunday. I'm running 5 HEPAs.

Dr. Jeff Masters (@drjeffmasters.bsky.social) 2026-07-16T13:16:07.510Z

20” of rain. That’s how much Mother Nature owes us! And judging by social comments, you guys want it back, with interest 😂Since Sept 1st (when it started getting dry) #Florida has fallen way behind… some 10-20” for most. 1/

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-16T12:29:20.536Z

Florida Tropical Development? A soaking rainmaker? Or both!? Here’s what we know… #Florida #Bertha

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-15T23:40:38.452Z

Desert 🌵 Or Deluge ⛈️?Here’s a little inside baseball ⚾️ Side by side model comparison of forecast rain. Most models are onboard the “Rain Train”! But the American GFS remains stubborn and just does not want to budge! 1/

Jeff Berardelli (@weatherprof.bsky.social) 2026-07-15T22:11:13.205Z

Chronic underestimators, the IEA calls solar #1 by 2033—but they’ve never kept up with reality. 🚀 With 2025 smashing records & storage racing ahead, coal could be dethroned by 2027–28, maybe sooner. The sun isn’t waiting for forecasts by the fossil lobby. ☀️ #Solar #BESS #EnergyTransition #Renewables

Chris Meder (@evcurvefuturist.com) 2025-09-21T10:37:06.811Z

Fossil fools may wish to pour a stiff one, grab a seat, and keep the smelling salts to hand…because Britain’s electricity is currently 82% zero carbon…with just one neat trick – #renewablesFossil fuel companies hate it.

Jon Burke🌍 (@jonburkeuk.bsky.social) 2026-03-17T14:46:32.357Z

A new analysis published this week by US financial services giant Lazard confirms that unsubsidised renewable energy remains the most cost-competitive form of new-build generation in the United States.reneweconomy.com.au/wind-solar-a…

Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-07-16T09:11:28.357Z

Before pontificating, Mr Roddy should surely have been made aware by DESNZ that there has been a 14% reduction in electricity consumption over the past twenty years.So, shame Roddy didn't bother to check the facts – but why spoil a good headline …www.politicshome.com/members/arti…

Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-07-16T11:33:26.558Z

By the time Sizewell C is built, peer reviewed published research reports the nuclear station will almost be entirely cut off by climate driven sea level rise storm surge at least once per year.'Rock shipped from Norway to protect Sizewell B during Sizewell C build' www.eadt.co.uk/news/2627134…

Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-07-16T09:09:32.611Z

Extreme heat impacts French nuclear www.power-technology.com/news/extreme… via @Power_OnlineMag

Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-07-16T09:15:06.620Z

Trump says a nuclear renaissance is coming. The deals aren’t. www.washingtonpost.com/business/202…

Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-07-16T07:38:13.683Z

“teenage geniuses and their billionaire backers aren’t going to save us, and they’re going to take us on a wild and expensive ride along the way,” says @rebeccarhelm.bsky.social about the Ocean Cleanup. My latest for @therevelator.org therevelator.org/why-ocean-cl… 🧪🦑🌎

David Shiffman, Ph.D. 🦈 (@whysharksmatter.bsky.social) 2026-07-16T11:54:53.068Z

Even running a HEPA unit indoors when the AQI is in the Hazardous range outside may not improve your indoor AQI to the "Good" range. My colleague @wisconsam.bsky.social improved their AQI from Purple (borderline Very Unhealthy) to Orange (Unhealthy for Sensitive Groups) by running HEPA in the room.

Dr. Jeff Masters (@drjeffmasters.bsky.social) 2026-07-16T15:14:45.960Z

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