Castaic February 25, 2023 10:25 am RV Trailers Fall Into Santa Clara River Several RV trailers fell into the Santa Clara River in Castaic after a roadway collapsed. As seen on air on NBC4 News on Feb. 25, 2023. US & World Videos 3:00 First Alert Forecast: Sunday forecast 2:35 First Alert Forecast: Another round of May Gray 3:09 First Alert Forecast: What's ahead for the weekend 3:39 First Alert Forecast: May Gray Lingers 3:04 First Alert Forecast: Temperatures stay in the 60s and 70s