.FOR CALIFORNIANS it felt like recognition. In 2013 a parade of storms, fuelled by climatic streams, killed at the very least 21 folks and induced virtually $5bn-worth of damages across the state. On February 4th this year the same form of storm once more wreaked havoc. Hurricane-strength winds buffeted the central shore near Huge Sur. In Los Angeles famous people were actually saturated as they arrived at the Grammy awards' red carpet. Mansions in the Hollywood Hillsides were dealt with in dirt. At least 3 individuals have perished. What are atmospherical streams, and are they a threat beyond The golden state?