Heat Advisory Up

A heat advisory is in effect for portions of the Bay Area starting Tuesday at 10 a.m. High temperatures are expected to reach 100 degrees in areas including Antioch, Clayton, Morgan Hill, and Vacaville, with widespread temperatures in the 90s. This day will be the hottest of the forecast, as high heat and humidity build throughout the morning and become most significant during the afternoon hours across the affected regions of the Bay Area.