.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. Last year a procession of tornados, fuelled through climatic streams, eliminated a minimum of 21 individuals as well as created almost $5bn-worth of harm all over the state. On February 4th this year the exact same sort of tornado once more ravaged. Hurricane-strength winds buffeted the core shoreline near Large Sur. In Los Angeles stars were saturated as they arrived at the Grammy honors' red carpet. Mansions in the Hollywood Hills were dealt with in mud. At the very least three folks have passed away. What are atmospheric rivers, and also are they a risk beyond California?