What is a climatic stream?

.FOR CALIFORNIANS it thought that du00e9ju00e0 vu. Last year a parade of hurricanes, sustained through atmospherical streams, eliminated at least 21 individuals and also created virtually $5bn-worth of damages across the state. On February 4th this year the very same kind of hurricane again ravaged.

Hurricane-strength winds buffeted the core shore near Large Sur. In Los Angeles famous people were saturated as they reached the Grammy awards’ red carpet. Manors in the Hollywood Hills were dealt with in mud.

At the very least 3 individuals have died. What are actually climatic waterways, and are they a danger past The golden state?