First Alert Forecast September 30, 2024 4:37 pm First Alert Forecast: Heat Returns Temperatures will warm up for the middle of the week, and more heat is on the way for the weekend. Meteorologist David Biggar has the evening forecast for Monday, September 30, 2024. US & World Videos 2:37 First Alert Forecast: Temperatures in the 90s 3:47 First Alert Forecast: Slightly Cooler Friday 3:10 First Alert Forecast: Red flag warning in effect 3:43 First Alert Forecast: Slight Cooling 3:17 First Alert Forecast: Heat continues