A historic and prolonged heat wave is currently affecting the western United States, with numerous climate sites facing high probabilities of breaking daily and all-time temperature records. The National Weather Service has issued excessive heat warnings for many areas, including Oregon, Southwest Washington, California, Nevada, and parts of the Pacific Northwest. The heat wave is expected to peak between late July 2024 and early August 2024.
One of the hottest places on Earth, Death Valley in California, has already broken its all-time record high for the date with temperatures reaching up to 127 degrees Fahrenheit (53.8 Celsius) on July 5, 2024. Other cities and regions experiencing extreme heat include Phoenix, Arizona (118 degrees Fahrenheit or 47.7 Celsius), Portland, Oregon (potentially the longest stretch of triple-digit temperatures on record), and Las Vegas, Nevada (forecasted to threaten its all-time high of 117 degrees starting July 9).
The heat wave is caused by a persistent high pressure system that has settled over the western half of the country, creating an omega blocking pattern. This stalled weather system is bringing intense and prolonged heat to many areas, increasing the risk of heat-related illnesses and deaths. The extreme temperatures could also test power grids and contribute to rapidly spreading wildfires.
To stay safe during this heat wave, officials advise residents to drink plenty of water, stay out of the sunshine as much as possible, check up on relatives and neighbors, especially those who are elderly or have chronic health conditions. Cooling centers have been set up in many areas for people in need. Anyone requiring transportation to a cooling center can call 211 or visit 211info.org.
The heat wave is expected to last through at least mid-August, with temperatures remaining above normal throughout the rest of the extended forecast.
