.FOR CALIFORNIANS it felt like du00e9ju00e0 vu. In 2014 a parade of tornados, fed through atmospheric waterways, killed at the very least 21 people and also led to virtually $5bn-worth of damage across the state. On February fourth this year the exact same kind of storm once more wreaked havoc. Hurricane-strength winds buffeted the central coast near Huge Sur. In Los Angeles stars were actually saturated as they came to the Grammy awards' ceremony. Mansion houses in the Hollywood Hillsides were covered in dirt. At least 3 people have actually passed away. What are actually climatic rivers, as well as are they a risk beyond California?