What is an atmospherical stream?

.FOR CALIFORNIANS it believed that familiarity. Last year a ceremony of storms, sustained by climatic waterways, killed at least 21 people as well as induced nearly $5bn-worth of damages around the condition. On February fourth this year the same form of storm once more ravaged.

Hurricane-strength winds buffeted the central shore near Big Sur. In Los Angeles stars were actually saturated as they reached the Grammy awards’ welcome mat. Mansions in the Hollywood Hills were actually covered in mud.

At the very least 3 folks have died. What are actually climatic waterways, as well as are they a hazard past California?