Harry Reid International Airport clocked 115 degrees on Saturday, August 1. That made it the hottest day Las Vegas has seen all year, and it landed within a single degree of the daily record of 116 that has stood since 1979. Locals love to brag about handling the heat. This time the heat nearly rewrote the book on them.
The average high for early August in the valley sits around 105. So Saturday ran a full 10 degrees hotter than a normal summer day, which in a town already known for frying eggs on the sidewalk is really saying something.
One Degree From the Record Books
Saturday’s 115 tied for the year’s peak and had forecasters watching the numbers all afternoon. The hottest temperature ever officially recorded in Las Vegas is 120 degrees, hit in July 2024 during what turned out to be the city’s hottest summer on record. So the town has felt worse. But a run this hot, this early in August, put Vegas in rare company. National Weather Service meteorologist Morgan Stessman told reporters the heat would stay dangerous straight through the weekend, with Sunday forecast to reach 114.
The Heat Dome Nobody Invited
The reason for all this is a ridge of high pressure parked over the West, pressing hot air down toward the ground and flat-out refusing to move. Forecasters call it a heat dome. This one stretched from Arizona all the way up to Montana and put roughly 45 million people under some kind of heat alert.
Stessman explained that the dome did more than crank up the thermometer. It wrung the moisture out of the air. Afternoon humidity in a lot of spots bottomed out in the single digits. Dry air plus triple-digit heat is a combination the desert knows well, and it set the stage for problems far beyond an uncomfortable walk to the car.
Seven Days Above 110
By the end of July, Las Vegas had already logged 10 separate days at or above 110 degrees. Phoenix had racked up 12 of them. Death Valley, the hottest place in North America, was forecast to flirt with 125. When the extreme heat warning kicked off on the morning of Thursday, July 30, forecasters started counting.
If the valley stayed at or above 110 through the weekend and into the following week, it would mark seven straight days of that punishing heat. That streak is the part that grinds people down. One 115-degree day is a story you tell your out-of-state cousin. A full week of it is a slog, and highs sat at 110 or higher for most of the days leading up to Saturday.
Cooling Stations Opened Across the Valley
Clark County did not wait around. Officials switched on cooling stations at community centers, libraries, and other public buildings across Las Vegas, North Las Vegas, and Henderson. The hours vary by location, but the rule was simple. Anybody who needed to get out of the heat could walk in, no questions asked. The county kept the stations running as the warning stretched deeper into the week.
Phoenix ran the same play. At the Justa Center, which normally serves seniors but opens as an afternoon cooling spot for anyone, operations director Rudy Soliz said about 200 people came through every day. The biggest headache, he said, was keeping enough water and electrolytes stocked. “Anybody can come in, get a meal, sign up, get checked in through the cooling center, sit down, relax, watch a little TV,” Soliz said.
Southern Nevada’s Toll Reached 46
By August 4, regional authorities reported that Southern Nevada’s heat-related death toll for the season had climbed to 46. Temperatures had eased only a little by then, hitting 113 at Harry Reid International on Monday afternoon after Saturday’s peak of 115.
Heat is the deadliest weather in the country. It quietly kills hundreds of Americans every year, more than hurricanes, tornadoes, or floods, and it does most of that damage without the drama of a storm on the radar. A number like 46 is easy to scroll past. It is also the kind of figure that puts a city’s whole summer in perspective.
The Desert Wasn’t the Only Place Burning
Fire crews had their hands full too. In Lincoln County, the Quail Springs Fire grew to more than 1,500 acres in the roughly 24 hours after it was reported Saturday, according to the Bureau of Land Management, fed by the same dry, hot air baking the valley.
Farther north, things turned rougher. Critical fire danger stretched from eastern Washington down through Oregon and Nevada. In Spokane County, Washington, thousands of residents were placed under an evacuation order because of the Old Trails Fire, with officials warning of historically strong winds and bone-dry air. Washington went so far as to declare a state of emergency and banned most outdoor and agricultural burning through the end of September.
Records Fell From Phoenix to Montana
Las Vegas had plenty of company in the misery. Phoenix hit 116 on August 1. El Centro, California, touched 118, a record for the day. The dome reached places you do not usually picture melting. Saturday saw daily records fall in Billings, Montana (104), Great Falls, Montana (104), Helena, Montana (103), Pocatello, Idaho (103), Grand Junction, Colorado (104), and Cedar City, Utah (100).
Two Nevada towns joined the list, with Ely reaching 99 and Eureka hitting 101. When Montana is busy setting heat records, the dome is clearly doing its job. Dozens of record highs were expected to topple across the West that weekend, from the California deserts to the Canadian border.
No Relief After Dark
The daytime highs grab the headlines, but the overnight lows are what made this stretch so brutal. On Thursday, some neighborhoods still cooled into the 70s and 80s after sunset. By the weekend, those lows were stuck around 90 in Las Vegas and Phoenix both.
“There’s just no relief overnight,” Stessman said. When the air never drops below the upper 80s, the day’s heat just stacks on top of itself, and the body never gets the break it counts on. That is the difference between a hot day and a genuinely nasty one.
The Warning Keeps Getting Extended
The extreme heat warning began July 30 with an expiration of 8 p.m. Sunday. Then it got pushed to Wednesday. Then it got pushed again, this time all the way to Saturday, August 8. That made it the second extension of a warning that started as a weekend advisory and turned into a week-plus siege.
NWS meteorologist Cody Moore said the dangerous heat would hang on through at least midweek, with valley highs in the low 110s on Monday before easing toward the upper 100s. He was blunt about how much that would help. Any relief, he said, would be short-lived and modest. For a city built on staying up all night, the smartest move for this stretch was the least glamorous one. Stay inside, drink water, and let the AC earn its keep until the dome finally packs up and moves on.
