... Excessive heat warning remains in effect from 10 am Monday to
8 PM PDT Tuesday...
* temperature... highs in the 90s near the coast and from 97 to
107 in inland Orange County, the western inland Empire and
western valleys in San Diego County. The beaches will not be
quite as hot with highs mostly in the 80s.
* Impacts... heat related illness is likely for those involved in
strenuous outdoor activity, or those with health conditions
that do not have adequate access to air conditioning. If
untreated, heat illness events could be fatal. Never leave
children or pets inside a parked car!
* Outlook... still very warm Wednesday. Gradual cooling Thursday
An excessive heat warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will combine to create a dangerous
situation in which heat illnesses are likely. Drink plenty of
fluids... stay in an air-conditioned room... stay out of the sun...
and check up on relatives and neighbors.
Severe Weather Get Mobile & Email Alerts
San Bernardino and Riverside County Valleys-The Inland Empire Severe Watches & Warnings NOAA Weather Radio
Watches & Warnings
Excessive Heat Warning
Issued: 9:17 PM PDT Oct. 21, 2017 – National Weather Service
Fire Weather Warning
Issued: 12:58 PM PDT Oct. 21, 2017 – National Weather Service
... Red flag warning remains in effect until 6 PM PDT Tuesday for
strong gusty winds and low humidity...
* wind... tonight and Sunday northeast winds 15 to 30 mph with
gusts to 45 near the coastal foothills and below passes and
canyons. Stronger and more widespread winds for Monday and
Tuesday with areas of northeast winds 25 to 35 mph with gusts
to 60 mph.
* Humidity... 5 to 10 percent Sunday... and around 5 percent Monday
and Tuesday with poorest overnight recovery in the windier
areas near the coastal foothills.
* Timing... through Tuesday... with the most extreme combination of
low humidity... stronger and more widespread winds... and heat on
Monday and Tuesday.
* Outlook... winds weaken Wednesday with some improvement in
* Impacts... any fires that develop will likely spread rapidly...
especially Monday and Tuesday. Outdoor burning is not
A red flag warning means that critical fire weather conditions
are either occurring now... .or will shortly. A combination of
strong winds... low relative humidity... and warm temperatures can
contribute to extreme fire behavior.
- Alta Loma
- Bryn Mawr
- Chino Hills
- Grand Terrace
- Lake Elsinore
- Loma Linda
- March AFB
- Mira Loma
- Moreno Valley
- Rancho Cucamonga
- San Bernardino
- San Jacinto
- Sun City