What is a climatic stream?

.FOR CALIFORNIANS it thought that recognition. In 2014 a ceremony of tornados, fed through atmospherical waterways, eliminated at the very least 21 people and induced almost $5bn-worth of harm across the state. On February 4th this year the very same form of storm again wreaked havoc.

Hurricane-strength winds buffeted the main shore near Significant Sur. In Los Angeles celebs were saturated as they arrived at the Grammy awards’ red carpet. Mansions in the Hollywood Hillsides were actually covered in mud.

At the very least three people have died. What are actually atmospherical streams, and are they a danger past The golden state?