California Severe Extreme Heat Warning | Effective 10/04/2026 21:10

Headline: 
Extreme Heat Warning issued October 4 at 9:10PM PDT until October 8 at 8:00PM PDT by NWS San Diego CA
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
October 4, 2026 - 9:10pm
Expires: 
October 5, 2026 - 6:15am
Description: 
* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to mid 90s at the beaches to the mid 90s to upper 90s for the mesas. Nights will be very warm with low temperatures in the 70s. * WHERE...San Diego County Coastal Areas. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Area Description: 
San Diego County Coastal Areas
Forcast Office: 
NWS San Diego CA
Sender: 
w-nws.webmaster@noaa.gov