.FOR CALIFORNIANS it thought that du00e9ju00e0 vu. In 2015 a procession of storms, sustained by atmospheric waterways, eliminated at least 21 people and induced nearly $5bn-worth of harm across the condition. On February fourth this year the exact same kind of tornado again wreaked havoc. Hurricane-strength winds buffeted the main shore near Major Sur. In Los Angeles famous personalities were actually soaked as they arrived at the Grammy awards' welcome mat. Estates in the Hollywood Hillsides were actually dealt with in dirt. At least 3 people have perished. What are actually atmospherical rivers, as well as are they a danger beyond The golden state?