.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. Last year a parade of storms, fed through atmospherical streams, eliminated a minimum of 21 individuals and triggered virtually $5bn-worth of harm all over the condition. On February fourth this year the exact same form of tornado once more wreaked havoc. Hurricane-strength winds buffeted the main shoreline near Significant Sur. In Los Angeles famous personalities were saturated as they reached the Grammy honors' welcome mat. Mansion houses in the Hollywood Hills were dealt with in dirt. At least 3 individuals have actually died. What are actually atmospheric rivers, and are they a risk beyond California?