bay area weather 10 hours ago Forecast: Excessive heat and hazy sky Meteorologist Kari Hall has details on dangerous heat and some safety tips in the Microclimate Forecast. US & World Videos 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 2:37 Kari's forecast: Excessive heat and hazy sky 3:12 Excessive heat warning in effect for parts of the Bay Area