San Diego County faces dangerous heat this week, desert highs could reach 112

San Diego County faces dangerous heat this week, desert highs could reach 112
Beachgoers at Pacific Beach during an unusual March heatwave. (Photo by Thomas Murphy / Times of San Diego)

Scorching heat will retain a grip on parts of San Diego County through Saturday, forecasters said Monday.

The National Weather Service issued an extreme heat warning for the San Diego County deserts, beginning at 10 a.m. Wednesday and stretching through 8 p.m. Saturday. The forecast calls for high temperatures of 104 to 112 degrees, with lows still in the mid-70s.

An unusually strong high-pressure system began pushing temperatures higher Monday, marking the start of a week of dangerously hot conditions expected to peak Thursday and Friday, the NWS said.

Heat advisories remain in effect through 8 p.m. Friday for San Diego County mountains, coastal areas and valleys. Temperatures could reach the 90s below 4,500 feet in the mountains, hit the 80s at higher elevations, climb into the 90s along the coast and reach triple digits in the inland valleys.

“Most days this week have the potential for daily temperature records to be broken or tied, with the potential for monthly temperature records to be broken or tied Wednesday through Friday,” forecasters said.

A weak offshore flow will bring wind gusts of 25 to 40 mph through Tuesday in the coastal mountain foothills and below passes, according to meteorologists.

Residents were advised to “drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on relatives and neighbors.”

City News Service contributed to this article.