.FOR CALIFORNIANS it thought that recognition. In 2015 a ceremony of storms, fed by atmospheric waterways, eliminated at least 21 folks and caused virtually $5bn-worth of damage across the state. On February 4th this year the very same sort of hurricane again wreaked havoc. Hurricane-strength winds buffeted the main coastline near Major Sur. In Los Angeles personalities were saturated as they reached the Grammy honors' welcome mat. Estates in the Hollywood Hills were dealt with in dirt. At the very least three people have actually perished. What are climatic rivers, and are they a threat beyond California?