Rain started early Saturday morning in San Rafael. Just a short time later, it spread across most of the Bay Area. Drivers crossing the Bay Bridge had to deal with slick conditions and fog.
The rain caught some people off guard Saturday along San Francisco's Embarcadero. It also caused serious flooding at O.co Coliseum where the Oakland Athletics were preparing for a game against the Minnesota Twins.
There was two hour rain delay at O.co where conditions were a soggy mess. The Athletics' field crews used sand to soak up rain puddles. The infield was covered with a tarp.
Leaks were everywhere you looked. There was a mini waterfall inside a hallway leading to the A's dugout.
Minnesota Twins relief pitcher Glen Perkins tweeted a picture, saying the visitor's dugout was flooded with water and raw sewage.
O.co has had a lot of issues this year with sewage leaks. But A's management tells us it was only water.
"There was water all the way, everywhere on the field level," stadium operations vice president David Rinetti said. "Everything drains from the top down here. So at the peak of the storm we probably got about an inch of rain in 30 minutes."
The rain delay was no big deal for the Gonzalez family.
"No, it's gonna stop," A's fan Imelda Gonzalez said. When asked if the A's were going to win, she enthusiastically said, "Of course!"
In San Francisco heavy rains toppled two huge branches of a ficus tree on Hyde Street, damaging three unlucky cars parked underneath.
"In my apartment, I hear what sounds like the cable cars coming up down the tracks," witness DJ Martin said. "Then I hear an explosion, glass shattering."
The tree stopped cable cars from running for a time and left some tourists stranded.
"We thought it'd be quick round trip and we'll be back in no time and then this happened," tourist Rose Herb said, jokingly adding, "And it never rains in California."
The downpour caught lots of people off guard along the Embarcadero.
"It wasn't raining when I left the house today," San Francisco resident Karina Leon Guerrero said. "I didn't bring an umbrella, I'm getting soaked."
"I think it's very bad for business," one vendor said.
Few shoppers at Justin Herman Plaza where jewelry vendors kept their merchandise covered so it wouldn't get ruined. But before noon we found many packing up, hoping customers and the sun will return on Sunday.
The rain didn't dampen the spirits of people in San Francisco taking part in this year's "Walk to End Alzheimer's."
They brought their running shoes and umbrellas. Others put on their ponchos to keep dry.
More than 3,000 people were expected to participate in Saturday's walk that raises money for Alzheimer's care, treatment, and research.