.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. In 2013 a ceremony of hurricanes, fed through atmospheric rivers, killed a minimum of 21 individuals and led to virtually $5bn-worth of damage all over the condition. On February fourth this year the same sort of storm once again created chaos. Hurricane-strength winds buffeted the core coastline near Large Sur. In Los Angeles celebrities were soaked as they came to the Grammy honors' ceremony. Estates in the Hollywood Hills were dealt with in dirt. At least 3 folks have perished. What are actually atmospheric streams, as well as are they a danger past California?