What is a climatic stream?

.FOR CALIFORNIANS it believed that familiarity. In 2013 a ceremony of tornados, sustained through atmospheric waterways, eliminated at the very least 21 individuals and also resulted in virtually $5bn-worth of damages around the state. On February 4th this year the very same type of storm once again wreaked havoc.

Hurricane-strength winds buffeted the central coastline near Major Sur. In Los Angeles famous people were soaked as they got to the Grammy awards’ red carpet. Residences in the Hollywood Hillsides were actually dealt with in mud.

At the very least three people have died. What are actually atmospheric streams, and are they a hazard past The golden state?