Heavy rain triggered flash flooding that swamped the streets of Folsom, California, on Thursday, March 22. Firefighters had to make at least one swift water rescue, according to a news report.A number of roads were closed because of the street flooding, and a road was closed in El Dorado County because of a mudslide. The rain is part of a system dumping heavy rain across California, which could trigger flash flooding and mudslides.This video, taken by a Folsom City Council member, shows flooding in part of the city. Credit: Roger Gaylord via Storyful