First Alert Forecast August 17, 2020 5:28 am First Alert Forecast: Poor Air Quality and Intense Heat Thunderstorms are possible in deserts and mountains. Belen De Leon has the forecast for Monday Aug. 17, 2020. US & World Videos 2:44 First Alert Forecast: Cooling trend on the way 3:47 First Alert Forecast: Cooler End of Week 3:43 First Alert Forecast: Warm Thursday 3:30 First Alert Forecast: Santa Ana Winds 2:49 First Alert Forecast: Gusty Santa Ana winds