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 4:12 First Alert Forecast: Deep marine layer 3:51 First Alert Forecast: Inside Slider 3:46 First Alert Forecast: Cloudier & Cooler 2:56 First Alert Forecast: Cooler week ahead 3:40 First Alert Forecast: Finally Feeling Like Fall