.FOR CALIFORNIANS it believed that familiarity. In 2014 a march of tornados, fed through climatic waterways, killed at least 21 folks and also caused nearly $5bn-worth of damages throughout the state. On February fourth this year the exact same type of tornado again created chaos. Hurricane-strength winds buffeted the core coast near Big Sur. In Los Angeles stars were saturated as they got to the Grammy awards' ceremony. Manors in the Hollywood Hills were dealt with in dirt. At least 3 people have actually perished. What are actually atmospheric rivers, and also are they a risk past California?