First Alert Forecast September 4, 2024 5:41 pm First Alert Forecast: Peak of the Heat Temperatures continue to warm into the end of the week. Meteorologist David Biggar has the evening forecast for Wednesday, September 4, 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