.FOR CALIFORNIANS it thought that remembrance. In 2015 a march of storms, sustained through atmospherical rivers, killed at least 21 people and induced nearly $5bn-worth of damages across the state. On February 4th this year the exact same kind of storm again created chaos. Hurricane-strength winds buffeted the central coast near Large Sur. In Los Angeles famous personalities were soaked as they got to the Grammy awards' red carpet. Manors in the Hollywood Hills were actually dealt with in mud. At least three individuals have died. What are atmospherical waterways, and are they a danger past The golden state?