A Severe Extreme Heat Warning is in effect for several areas of California, including Parker Valley, Kofa, Yuma, and Imperial County, through August 21, 2026, at 20:00. The warning was issued by the National Weather Service (NWS).
The affected regions may experience dangerously hot conditions, with afternoon temperatures ranging from 107 to 114°F. This warning is expected to remain in effect from 10:00 AM MST /10:00 AM PDT/ on Monday, August 15, until 8:00 PM MST /8:00 PM PDT/ on Friday, August 21.
An Extreme Heat Warning indicates that a period of very hot temperatures, even by local standards, will occur. Heat-related illnesses may increase significantly during this time. Overexposure to extreme heat can lead to heat cramps, heat exhaustion, and, without intervention, heat stroke.
To stay safe during this extreme heat event, take extra precautions if you work or spend time outside. Reschedule strenuous activities to early morning or evening when possible. Wear lightweight and loose-fitting clothing and drink plenty of water. The Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments during outdoor work. If you or someone else shows signs of heat-related illness, move to a cool and shaded location. Heat stroke is an emergency; call 911. Public cooling shelters may be available in some areas; consult county officials for more details.
