.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. Last year a march of tornados, fuelled through climatic waterways, gotten rid of at least 21 folks and also triggered nearly $5bn-worth of damage across the condition. On February 4th this year the very same kind of hurricane once again wreaked havoc. Hurricane-strength winds buffeted the core coastline near Huge Sur. In Los Angeles stars were actually saturated as they got to the Grammy awards' ceremony. Residences in the Hollywood Hills were actually covered in mud. A minimum of 3 folks have actually died. What are actually atmospheric waterways, and also are they a hazard beyond The golden state?