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: Just How Bad Will Western Heatwave Gasprom Get?
Dear Diary. As many of my readers might know, a heatwave doesn’t become a historic CAT4 on a 1-5 scale unless it has the potential to kill hundreds of people and/or tie or set many all-time records. A CAT 5 heatwave would be catastrophic, killing thousands of people, such as the European system from the summer of 2003. After several days of judging the system, it looks like Gasprom will peak on Monday or Tuesday as a CAT4 across desert areas. Palm Springs has already established an all-time max of 124°F/51°C on Friday. Las Vegas could on Monday and/or Tuesday. These cities and their residents are used to extreme heat, however.
My main concern is for the homeless population stretching in cities from San Francico to Los Angeles. Thankfully, as usual when western heatwaves develop, the most eastern portions of coastal cities are at ris .for more. details on Heatwave Gasprom, here is a Washington Post article:
West coast heat wave forecast for 12 cities facing record temperatures – The Washington Post
A historic heat wave is scorching the West Coast. Here’s the forecast for 12 cities.
Highs are predicted to reach at least 100 to 120 degrees throughout California, except right along the coast.

Updated July 6, 2024 at 11:03 a.m. EDT|Published July 5, 2024 at 1:34 p.m. EDT

A temperature of 108 degrees is displayed on a bank sign in Sacramento on Wednesday. (Rich Pedroncelli/AP)
One of the worst heat waves on record for the western United States is set to peak between this weekend and early next week, bringing a brutal, enduring spell of high temperatures to the Southwest, much of California and parts of the Pacific Northwest.
“Numerous climate sites face high probabilities of breaking daily as well as all-time temperature records,” wrote the National Weather Service office serving Las Vegas. “Oppressive heat is expected to continue through at least midweek.”
On Friday, Palm Springs soared to 124 degrees, the maximum in 102 years of recordkeeping there. Redding also reached 118, tying an all-time record in 131 years of data. While far from the West Coast, but worth a mention nonetheless, Raleigh in North Carolina also set an all-time record of 106 Friday.
Highs are predicted to continue reaching at least 100 to 120 degrees throughout California, except right along the coast and on mountain peaks, increasing the threat of heat-related illnesses and deaths. These temperatures could also test power grids.
The Weather Service’s 0-to-4 HeatRisk scale is forecast to reach the top tier “extreme” Level 4 over large areas of California’s interior as well as southern Nevada.

Maximum NWS HeatRisk over the next week. (Ian Livingston)
In California’s south and north, Weather Service offices have heat alerts extending 200 hours into the future, the longest on record.
“Plan on major heat risk impacts, even in the mountains,” the Weather Service office in Reno, Nev., wrote. “Take this one seriously.”
Death Valley, which holds the record for the highest temperature ever measured on the planet, reached 127 degrees Friday and has forecast highs of 128, 130, 128, 130, 129, 129 and 127 between Saturday and next Friday; this stretch could mark its hottest streak on record. It probably won’t reach its world-record high temperature of 134 set in 1913, although there are questions about the reliability of that measurement. In 2020 and 2021, it reached 130 degrees, the highest reliably observed temperature in modern records, which could be surpassed in the coming days.
Here’s a quick look at how hot it could get in 12 cities in the western United States through early next week.
Redding, Calif.: Heat warning and max temperature forecast of 120
It has already been as hot as 118 in this Northern California city, tying the all-time high previously set on three other dates, but none so early in the year. Even the summit of nearby Mount Shasta, which towers over 14,000 feet, is under a heat advisory.
- Saturday: 120 high
- Sunday: 115 high / 81 low
- Monday: 114 high / 81 low

Sacramento: Heat warning and max temperature forecast of 113
Much like Redding, the heat will be extreme and unrelenting, while the scalding sunshine may only be inhibited by wildfire haze. The all-time high here is 115.
- Saturday: 113 high
- Sunday: 107 high / 64 low
- Monday: 103 high / 62 low
San Francisco: Max temperature forecast of 79
The worst of the heat is forecast to spare downtown San Francisco, surrounded by chilly waters from the Pacific Ocean on three of four sides. Highs are predicted to reach only the upper 70s. However, heat advisories and excessive-heat warnings surround the city for temperatures into the triple digits, except to the west where immediate coastal areas may rise to only around 60.
- Saturday: 79 high
- Sunday: 74 high / 55 low
- Monday: 72 high / 55 low
Fresno, Calif.: Heat warning and max temperature forecast of 113
Scorching heat is predicted throughout all of California’s Central Valley. Near the southern end, Fresno sees endless sun and highs from 110 to 115. There’s also an elevated fire threat amid multiple ongoing blazes. A high of 113 would rank among the top 10 hottest on record; 115 is the all-time high.
- Saturday: 113 high
- Sunday: 113 high / 79 low
- Monday: 110 high / 77 low

Santa Barbara, Calif.: Heat warning and max temperature forecast of 87
Its proximity to the coast will offer some relief, but predicted highs are still unusual for a coastal city. Some fog may occasionally moderate the heat slightly.
- Saturday: 87 high
- Sunday: 83 high / 63 low
- Monday: 83 high / 62 low
Los Angeles: Heat advisory and max temperature forecast of 90
The sprawling L.A. metro area will see highs ranging from the 70s at the coast to near 105 inland.
- Saturday: 90 high
- Sunday: 86 high / 66 low
- Monday: 86 high / 65 low

Heat wave key points from NWS Los Angeles. (National Weather Service)
Palm Springs, Calif.: Heat warning and max temperature of 119
Friday’s all-time high of 124 was 6 degrees above predictions. It will continue to be subjected to day after day of highs near 120, with lows around 90.
- Saturday: 117 high
- Sunday: 117 high / 89 low
- Monday: 119 high / 89 low
San Diego: Max temperature of 77
This is one of the few places in Southern California to escape the heat, with highs near 80 the next several days. However, temperatures rapidly rise to the 110s in the Inland Empire and near 120 in the deserts.
- Saturday: 77 high
- Sunday: 77 high / 66 low
- Monday: 76 high / 68 low

Las Vegas: Heat warning and max temperature of 117
Sin City could threaten its all-time high of 117 starting Sunday, with the best odds perhaps on Tuesday, while nighttime lows dip only to the mid-80s to around 90.
- Saturday: 114 high
- Sunday: 117 high / 86 low
- Monday: 115 high / 87 low
Reno, Nev.: Heat warning and max temperature of 103
At about 4,500 feet, nestled in a valley at the eastern edge of the Sierra Nevada, Reno is likely to experience highs of 100 to 105 until further notice.
- Saturday: 103 high
- Sunday: 103 high / 69 low
- Monday: 103 high / 67 low

Palm Springs set an all-time record Friday, beating the prior 123. (Ian Livingston)
Portland, Ore.: Heat warning and max temperature of 103
Heat ramped up Friday and stays intense at least into early next week. “This heat wave will likely be remembered more for its duration than its intensity,” the Weather Service office in Portland wrote. It warned that elevated overnight lows in urban areas will make conditions “particularly dangerous.”
- Saturday: 99 high
- Sunday: 101 high / 67 low
- Monday: 103 high / 68 low
Seattle: Heat advisory and max temperature of 93
Even well to the north in the Pacific Northwest, the heat is on. Several days of 90s will scorch Seattle amid mostly sunny conditions. East of the Cascade Mountains, where heat warnings are in effect, temperatures will eclipse the century mark.
- Saturday: 90 high
- Sunday: 92 high / 61 low
- Monday: 93 high / 63 low

By Ian Livingston Ian Livingston is a forecaster/photographer and information lead for the Capital Weather Gang. By day, Ian is a defense and national security researcher at a D.C. think tank. Twitter
Here are more “ETs” recorded from around the planet the last couple of days, their consequences, and some extreme temperature outlooks, as well as any extreme precipitation reports or outlooks:
Here is more new June 2024 climatology:
Here is More Climate News from Saturday:
(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.)