.FOR CALIFORNIANS it seemed like familiarity. In 2014 a ceremony of hurricanes, sustained through atmospheric streams, killed at the very least 21 individuals and also induced almost $5bn-worth of damages all over the state. On February 4th this year the very same sort of hurricane again created chaos. Hurricane-strength winds buffeted the core shore near Big Sur. In Los Angeles personalities were actually saturated as they arrived at the Grammy honors' ceremony. Mansions in the Hollywood Hills were actually covered in mud. At least three folks have actually died. What are actually atmospheric waterways, and are they a risk past California?