Extreme Heat Warning Issued for Southwest California Through Friday

SMFD cooling off kids at Lacey Park in 2023 (File Photo – San Marino City)

The National Weather Service Los Angeles/Oxnard has issued an Extreme Heat Warning in effect through 8:00 pm Friday, March 20, as dangerously high temperatures grip much of southwest California.

By News Desk

Forecasters warn that temperatures ranging from 96 to 104 degrees are expected across most valley, lower mountain, and inland coastal areas. The prolonged heat wave is anticipated to persist through the remainder of the week, with little day-to-day relief—particularly in regions away from the coast.

Officials caution that these extreme conditions pose a high risk of heat-related illness, especially for vulnerable populations, including young children, older adults, individuals without access to air conditioning, and those engaging in outdoor activities. Compounding the danger, overnight temperatures will remain unusually warm, limiting the body’s ability to recover from daytime heat, especially in foothill and mountain communities.

Pasadena and San Gabriel Valley Forecast

In the greater Pasadena area and the San Gabriel Valley, residents can expect a stretch of consistently hot and dry weather:

• Wednesday: Sunny and hot, high near 100°F; light winds increasing to 5–10 mph in the afternoon.
• Wednesday Night: Clear, low around 66°F.
• Thursday: Sunny and hot, high near 102°F; light southwest winds.
• Thursday Night: Clear, low around 68°F.
• Friday: Sunny and hot, high near 100°F.
• Saturday: Sunny, high near 96°F.
• Sunday: Slight cooling trend with mostly sunny skies and a high near 91°F.

Authorities urge residents to stay hydrated, avoid strenuous outdoor activity during peak heat hours, and check on at-risk neighbors and family members. Cooling centers may be available in some communities as the region endures this extended heat event.