Heat Wave Smashes Records in West, Advances to Plains with Widespread Risks

An oppressive heat wave left cities in the western United States dealing with conditions typical of midsummer this weekend. More than 150 daily temperature records and around 50 monthly all-time records fell between Tuesday and Saturday, according to the National Weather Service. Death Valley reached 105 degrees on Thursday, a new monthly record, before Furnace Creek hit 106 degrees on Sunday, the highest temperature in the country that day.

The heat wave will continue building and spreading east into the central United States in the coming days. Temperatures 20 to 40 degrees above average will be common from the Southwest into the Great Plains, the National Weather Service reported. Parts of California were already well above seasonal averages, with highs expected to stay in the triple digits at Death Valley into next week.

Clark County Commissioner Marilyn Kirkpatrick warned that Southern Nevada faces an unprecedented heat wave ahead of summer, putting people at greater risk for heat-related illnesses. Las Vegas hit 93 degrees on Sunday, leading officials to open more than 40 daytime cooling stations across the city. The National Weather Service in Las Vegas advised people to wear sunscreen, eat light meals, and avoid caffeine and alcohol when outdoors.

Fort Collins in Colorado reached 91 degrees on Saturday, a new all-time high for March since recordkeeping began in 1893. Denver hit 86 degrees the same day, raising wildfire risks due to the heat, low humidity, and breezy winds. In Phoenix, trails at Camelback Mountain Preserve and other sites closed during daytime hours, with restrictions in place from 8 a.m. to 5 p.m. local time.

At least 10 Major League Baseball spring training games in the Phoenix area shifted start times to after 6 p.m. to avoid triple-digit heat, according to the Cactus League. The Glendale Fire Department transported about 30 people to hospitals on Saturday for heat-related illnesses during the Luke Days Air Show. The Maricopa County Department of Public Health urged residents to stay indoors with air conditioning, drink water, and limit outdoor activities during peak heat hours.

Recent years have seen more homes add air-conditioning, which could help as some areas face temperatures 40 degrees above normal this week. The Phoenix Trail Heat Safety Program, established in 2021, restricted trail access this weekend due to extreme heat warnings. Southern Nevada residents, not yet accustomed to such early heat, now have access to cooling stations as a key resource.

This heat wave underscores risks to public health and infrastructure, with low humidity and winds increasing fire dangers in places like Colorado. People in the Plains should prepare by checking local weather updates and using available cooling resources to prevent heat-related issues. The expansion of the heat dome highlights ongoing challenges for communities adapting to these conditions.