What is an atmospherical waterway?

.FOR CALIFORNIANS it seemed like remembrance. In 2014 a procession of hurricanes, fuelled through climatic waterways, eliminated at the very least 21 folks and also triggered almost $5bn-worth of damages around the state. On February 4th this year the exact same type of tornado once more created chaos.

Hurricane-strength winds buffeted the main coastline near Big Sur. In Los Angeles celebs were soaked as they arrived at the Grammy honors’ welcome mat. Estates in the Hollywood Hillsides were actually dealt with in dirt.

At the very least 3 individuals have passed away. What are climatic rivers, and are they a threat past The golden state?