California Severe Extreme Heat Warning | Effective 10/03/2026 04:01

Headline: 
Extreme Heat Warning issued October 3 at 4:01AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
October 3, 2026 - 4:01am
Expires: 
October 3, 2026 - 2:15pm
Description: 
* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to lower 90s near the coast to the mid 90s to low 100s for the mesas and other higher coastal terrain expected. Nights will be very warm with low temperatures mostly 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