.FOR CALIFORNIANS it seemed like familiarity. In 2015 a ceremony of tornados, fed by atmospheric streams, eliminated a minimum of 21 people as well as induced virtually $5bn-worth of harm around the state. On February 4th this year the very same kind of storm once more ravaged. Hurricane-strength winds buffeted the central coastline near Significant Sur. In Los Angeles celebrities were saturated as they reached the Grammy awards' ceremony. Residences in the Hollywood Hillsides were dealt with in mud. At the very least three individuals have died. What are atmospherical streams, and also are they a danger beyond California?