Henry DiCarloNational Weather ServiceKTLA

National Weather Service issues extreme heat warnings for California; KTLA meteorologist Henry DiCarlo says "we are just 48 hours away from a good 15 to 20 degree cooldown"

The National Weather Service has issued extreme heat warnings for California, with temperatures soaring 10 to 15 degrees above normal. KTLA meteorologist Henry DiCarlo predicts a significant cooldown of 15 to 20 degrees within 48 hours, bringing relief from the oppressive heat and humidity.

CBS News CBS News+1 source10 September 2026 · 16:00 UTC
CuriousCats Full Story

The National Weather Service has issued extreme heat warnings for California, with temperatures expected to remain 10 to 15 degrees above normal through Thursday.14

Weather officials are concerned about the elevated risk of heat-related illnesses, including stroke and exhaustion, as humidity contributes to discomfort.

Residents are urged to limit outdoor activities and stay hydrated, especially as temperatures range from the mid-90s to around 110 degrees in parts of Los Angeles, Orange, Riverside, San Bernardino, and Ventura counties.

KTLA meteorologist Henry DiCarlo noted, “Now we quickly get there. I mean, we are just 48 hours away from a good 15 to 20 degree cooldown.”5

This shift in weather patterns is expected to bring a stronger onshore flow and morning cloud cover, leading to “very comfortable” conditions next week.

The Weather Service anticipates a noticeable drop in humidity levels beginning Friday, marking a refreshing return to benign Southern California weather.

However, until then, the heat warnings will remain in effect until 8 p.m. Thursday, with little overnight relief as lows stay in the 70s and 80s.3

People are reminded to never leave children or pets in unattended vehicles, as temperatures inside can become lethal within minutes.

Key Insight
“Heat advisories remain in effect through 8 p.m. Thursday for parts of Los Angeles, Orange, Riverside, San Bernardino and Ventura counties, with temperatures ranging from the mid-90s to around 110 degrees. The high-pressure ridge will begin to flatten on Friday, bringing significant cooling by the weekend and a "refreshing return to benign Southern California weather."”
CuriousCats studied:
1
CBS NewsCBS News
“The sweltering heat and humidity will remain in Southern California through Thursday, with temperatures well above average.”
CBS News →
2
KTLAKTLA
“Southern California will suffer another oppressive day of extreme heat and high humidity on Thursday, but there is good news on the horizon.”
KTLA →
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