What is actually a climatic river?

.FOR CALIFORNIANS it felt like remembrance. In 2013 a ceremony of storms, fuelled through climatic streams, eliminated a minimum of 21 people as well as created nearly $5bn-worth of damages around the state. On February fourth this year the same type of storm once again ravaged.

Hurricane-strength winds buffeted the main coast near Big Sur. In Los Angeles famous people were saturated as they got to the Grammy awards’ welcome mat. Mansion houses in the Hollywood Hills were actually covered in dirt.

At the very least 3 folks have perished. What are actually climatic waterways, and are they a risk past California?