Heat wave to hit Bay Area, with highs in 90s

(04-28) 16:13 PDT SAN FRANCISCO -- The Bay Area is on the front end of a significant warming trend, with temperatures expected to climb into the mid-90s in some locations by the middle of the week, forecasters said Monday.

San Francisco topped out at 75 degrees Monday, but that was only the beginning of the mini-heat wave set to descend on the region Tuesday, Wednesday and Thursday, said Matt Mehle, a forecaster with the National Weather Service.

By midweek, temperatures in the city should be nearly 10 degrees warmer, with forecasted highs in San Francisco in the mid-80s, but the hottest spots will be farther south.

Inland Santa Clara and Monterey counties are expected to easily climb into the 90s, with some locations approaching triple digits, Mehle said. Livermore's forecast high on Thursday is 95, and Brentwood may see 96.

The North Bay will see its fair share of heat as well with Santa Rosa expecting temperatures in the low 90s and Lake Berryessa topping out around 95 degrees on Thursday, Mehle said.

A cooldown is expected Saturday, when temperatures should return to seasonal norms, with a 63-degree high for San Francisco, according to the weather service.