Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued October 4 at 4:28AM PDT until October 8

Affecting San Bernardino and Riverside County Valleys-The Inland Empire

In effect until: Oct 4, 2026, 9:15 PM

San Bernardino and Riverside County Valleys-The Inland Empire

Likely impact; effects through 9:15 PM.

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.

See it on the live map View official source

Read the original bulletin (official text)

* WHAT...Dangerously hot conditions with high temperatures in the
upper 90s to 103 and warm nights with low temperatures in the low
to mid 70s expected.

* WHERE...San Bernardino and Riverside County Valleys-The Inland
Empire.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

Free. In your language.

Get the next alert for your area before it matters.

Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Extreme Heat Warning issued October 4 at 4:28AM PDT until October 8

Get the next alert for your area before it matters.

Get alerts in your language