.FOR CALIFORNIANS it believed that recognition. In 2014 a procession of storms, sustained through atmospherical streams, eliminated a minimum of 21 people and also triggered nearly $5bn-worth of damage across the condition. On February fourth this year the exact same form of tornado again wreaked havoc. Hurricane-strength winds buffeted the core coastline near Large Sur. In Los Angeles famous people were saturated as they came to the Grammy awards' welcome mat. Mansion houses in the Hollywood Hills were covered in mud. At least three folks have perished. What are actually atmospherical streams, and are they a hazard past California?