First Alert Forecast June 20, 2021 9:53 am First Alert Forecast: Father's Day SoCal’s heatwave is about to end, starting with slight cooling Sunday west of the mountains. Shanna Mendiola has the forecast for Sunday, Jun. 20, 2021. US & World Videos 3:31 First Alert Forecast: Mostly Cloudy Saturday 3:12 First Alert Forecast: Rain this weekend 3:46 First Alert Forecast: Weekend Sprinkle Chance 3:47 First Alert Forecast: Morning Clouds & Fog 3:03 First Alert Forecast: More Clouds & Fog