What is actually an atmospheric waterway?

.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. In 2013 a march of tornados, fuelled by climatic waterways, gotten rid of at least 21 folks and also caused virtually $5bn-worth of damages throughout the state. On February fourth this year the same form of hurricane again wreaked havoc.

Hurricane-strength winds buffeted the central shore near Big Sur. In Los Angeles celebs were soaked as they reached the Grammy honors’ ceremony. Manors in the Hollywood Hills were actually covered in dirt.

At least 3 people have perished. What are actually climatic waterways, and also are they a risk beyond The golden state?