.FOR CALIFORNIANS it seemed like familiarity. In 2014 a march of tornados, fuelled through climatic streams, killed at the very least 21 people as well as led to nearly $5bn-worth of damage across the state. On February fourth this year the very same kind of hurricane once more wreaked havoc. Hurricane-strength winds buffeted the main shore near Large Sur. In Los Angeles celebrities were soaked as they arrived at the Grammy awards' welcome mat. Manors in the Hollywood Hillsides were actually covered in dirt. At the very least 3 folks have died. What are actually climatic rivers, and also are they a danger past California?