bay area weather 4 hours ago October heat wave in the Bay Area An excessive heat warning is in effect through Wednesday night in much of the greater Bay Area because of temperatures that could reach 110 degrees in some inland locations. Jeff Ranieri and Pete Suratos report. US & World Videos 2:49 Jeff's Forecast: Heat wave to bring temps as high as 107 5:15 Historic October heat in the Bay Area 3:26 Vianey's forecast: Heat wave persists 2:00 Autumn heat wave bakes the Bay Area 2:44 Forecast: Excessive heat and hazy sky