In this Thursday, May 22, 2008, file photo, a tornado touches down in Riverside, Calif. On Tuesday, January 10, 2017, a twister touched down south of the state capital and registered EF0, at the lowest edge of the tornado scale that goes up to EF5. The Enhanced Fujita (EF) scale measures the intensity of tornadoes in the U.S. and Canada based on damage caused. (Photo by Michael Ritter/AP Photo)
|