What is an atmospheric stream?

.FOR CALIFORNIANS it thought that familiarity. Last year a procession of hurricanes, sustained through atmospherical rivers, gotten rid of at least 21 individuals and led to almost $5bn-worth of damages throughout the condition. On February 4th this year the same sort of storm once more created chaos.

Hurricane-strength winds buffeted the central coast near Significant Sur. In Los Angeles famous personalities were actually saturated as they reached the Grammy honors’ welcome mat. Estates in the Hollywood Hillsides were actually dealt with in mud.

A minimum of 3 people have died. What are atmospheric rivers, as well as are they a threat past California?