The thermometer could shoot past 100 degrees today in inland spots such as Livermore as the high-pressure system that has given the Bay Area its long-delayed taste of summer continues to keep the chill and fog away.

Temperatures should be in the 70s at the beaches in San Francisco and in the 80s downtown, with warming into the 90s in the South Bay and East Bay, said Bob Benjamin, a forecaster for the National Weather Service in Monterey.