The American Southwest is bracing for a major multi-day heatwave that threatens to shatter temperature records and elevate the risk of wildfires. Experts are warning residents from Southern California to Arizona and Nevada to prepare for extreme conditions, with temperatures expected to soar well into the triple digits.
Triple-Digit Temperatures Threaten Records
Starting Wednesday and continuing through the weekend, a powerful ridge of high pressure will bake the region, potentially breaking daily temperature records in cities like Los Angeles, Phoenix, and Las Vegas. The National Weather Service has issued widespread heat advisories, watches, and warnings, urging residents to take precautions against the dangerous heat.
"This dangerous level of heat will pose a threat to anyone without effective cooling and adequate hydration," warned the NWS, forecasting highs that could exceed 110°F (43°C) in the desert Southwest and surpass 100°F across Southern California.
Compounding Dangers: Heat, Thunderstorms, and Fire Risk
The extreme weather event presents a trio of compounding dangers. In addition to the intense heat, there's an elevated chance of thunderstorms and a heightened risk of wildfires. Dry conditions combined with extreme heat create ideal conditions for fires to ignite and spread rapidly.
Staying Safe During the Heatwave
Authorities are urging residents to take the following precautions:
- Stay hydrated by drinking plenty of water.
- Seek out air-conditioned environments, such as cooling centers.
- Avoid strenuous outdoor activities during peak heat hours.
- Check on vulnerable neighbors and family members.
- Never leave children or pets unattended in vehicles.
Los Angeles Mayor Karen Bass emphasized the severity of the situation, stating that the city is expecting "potentially some of the hottest temperatures of the summer." Cooling centers are being opened across the city to provide relief to residents.
Heat Lingers After Sunset
Adding to the danger, temperatures are expected to remain high even after the sun sets, offering little overnight reprieve. Climate scientist Daniel Swain noted the possibility of "widespread record warm overnight minimum temperatures" throughout the West.
The extreme heat is expected to extend as far north as the Seattle region, with temperatures in the 90s anticipated on Saturday. Portland, Oregon, is under a fire weather watch for Thursday.