What is an atmospherical waterway?

.FOR CALIFORNIANS it seemed like remembrance. In 2013 a parade of storms, fed by climatic waterways, eliminated a minimum of 21 individuals and resulted in virtually $5bn-worth of harm around the condition. On February 4th this year the same kind of tornado once more ravaged.

Hurricane-strength winds buffeted the main shoreline near Big Sur. In Los Angeles famous personalities were actually saturated as they came to the Grammy awards’ red carpet. Estates in the Hollywood Hills were dealt with in dirt.

At least three folks have died. What are actually atmospheric waterways, as well as are they a risk past The golden state?