San Jose, the state's third-biggest city, has declared a water emergency.
The Napa quake also served as a reminder that most Californians don't have earthquake insurance.
The storm made landfall early Friday morning, bringing heavy rain and wind to the Hawaiian islands.
These storms are expected to deliver lots and lots of rain and big waves.
Mother Nature has produced a lot of bad news this summer.
At least 16 people have been killed in the U.S. by lightning so far this year.
Video shows shoppers rescuing the children.
Remember the polar vortex? It's returning to haunt the northern and northeaster U.S. soon.
It was an astonishing scene over the Great American Ball Park. (Also, the Reds won.)