Orange County December 14, 2021 7:09 pm Rivers of Mud Slide Through Silverado Canyon Mandatory evacuations were ordered for the burn areas. Vikki Vargas reports for the NBC4 News on Tuesday, Dec. 14, 2021. US & World Videos 2:59 First Alert Forecast: Windy Friday with possible showers 3:46 First Alert Forecast: Windy Friday 2:51 First Alert Forecast: Cooler weather lingers before weekend warm-up 3:49 First Alert Forecast: Cloudy & Drizzly Thursday 3:03 First Alert Forecast: Sweater weather