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Extreme Heat Warnings Issued Across the West as Temperatures Soar
4 Aug
Summary
- Dangerously hot conditions forecast in 5 Western and Southwestern cities
- Temperatures expected to reach up to 120°F, posing risks to vulnerable populations
- NWS warns of "lethal temperatures" in unattended vehicles within minutes
On August 4, 2025, the National Weather Service (NWS) warned that five cities across the Western and Southwestern United States are forecast to face "dangerously hot conditions" this week. The affected cities, including San Diego, California, and Phoenix, Tucson, and Flagstaff in Arizona, are expected to experience temperatures soaring as high as 120 degrees Fahrenheit in some areas.
The NWS has issued extreme heat warnings for these regions, cautioning that the extreme heat could lead to heat-related illnesses and even death. The agency has specifically warned that car interiors can reach "lethal temperatures in a matter of minutes," and has advised residents not to leave young children and pets unattended in vehicles.
Extreme heat poses a particular risk to vulnerable populations, such as older adults, young children, and those with certain medical conditions. According to the Centers for Disease Control and Prevention (CDC), dangerously hot conditions are responsible for around 700 deaths per year in the United States.
The NWS has urged residents of the affected cities to take precautions, such as rescheduling strenuous activities to the early morning or evening, seeking shade or air-conditioned environments, and staying hydrated. The agency has also advised that public cooling shelters may be available in some areas.
