Extreme Heat Warnings Persist Across Southwestern U.S., Temperatures Reach 120°F (49°C)
A dangerous heatwave continues to intensify across the southwestern United States, with Extreme Heat Warnings active in many areas as of July 31, 2026, at 08:37 UTC. The National Weather Service (NWS) forecasts temperatures ranging from 44–49°C (112–120°F) in parts of Arizona and California, including Phoenix, Yuma, and the Imperial Valley, through August 3. The Weather Prediction Center (WPC) has issued Major to Extreme HeatRisk alerts for the region, with dozens of daily and monthly high-temperature records expected to be broken. The heatwave is also spreading into the Intermountain West and northern High Plains, with temperatures of 32–43°C (90–109°F) forecast in states like Nevada, Wyoming, and Montana. Warm nighttime temperatures, ranging from 18–24°C (65–75°F), are compounding the heat's impact by limiting overnight relief.