First Alert Forecast September 5, 2024 5:41 pm First Alert Forecast: Dangerous Heat into Weekend Temperatures will remain hot into the weekend. Meteorologist David Biggar has the evening forecast for Thursday, September 5, 2024. US & World Videos 3:45 First Alert Forecast: Morning Drizzle 3:42 First Alert Forecast: Cool Wednesday 2:34 First Alert Forecast: Cooler temperatures 3:10 First Alert Forecast: Cooling trend 3:22 First Alert Forecast: Cooler Temps Ahead