# Extreme Heat Watch: San Diego County Coastal Areas; San Bernardino and Riverside County Valleys-The Inland Empire; San Diego County Inland Valleys; Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/03392e72ff828e97

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-09-30 13:41 ingested 2026-10-01 02:57

[original source ↗](http://www.weather.gov/)

## extract

Extreme Heat Watch — San Diego County Coastal Areas; San Bernardino and Riverside County Valleys-The Inland Empire; San Diego County Inland Valleys; Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
Severity: Severe. Certainty: Likely.
* WHAT...Dangerously hot conditions with high temperatures on the
hottest days ranging from around 90 near the coast to the upper 90s
to upper 100s for the valleys possible. Low temperatures for
coastal areas into the western valleys will warm into the lower to
mid 70s during the weekend with those warm overnight temperatures
continuing for next week.

* WHERE...Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, San Diego County Valleys, and Santa Ana
Mountains and Foothills.

* WHEN...From Friday morning through Wednesday evening.

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

* ADDITIONAL DETAILS...A long-duration heat wave is expected to
develop late this week and continue through much of next week into
the following weekend with Moderate or greater HeatRisk for the
coast and valleys and Major to Extreme HeatRisk for inland coastal
areas into the western valleys.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.