Emergency management officials are reminding people to take the National Weather Service alerts seriously.
With downed trees and smashed cars, Saturday's storm brought along with it the first-ever tornado warning for San Francisco.
It comes just one week after the Bay Area braced itself amid a tsunami warning.
"In one week, a Tsunami Warning and a Tornado Warning. That's pretty remarkable, in terms of how often we get those," said San Francisco State Professor Emeritus John Monteverdi, who studies severe storms.
He says with climate change, comes more atmospheric rivers.
"That's the way we expect climate change to manifest. With storms that produce more rainfall and intense rainfall, and embedded in those bands can be circulations like the one that resulted in the tornado warning," Monteverdi said.
Many people in San Francisco got woken up by an alert for a Tornado Warning and were left wondering if it was real and what should they do.
"I was confused I woke up and never heard of anything happening in this area, so I was confused more than anything," said Kaylee Smith.
Some even challenged the severity of these types of warnings.
"I've been a Bay Area resident my whole life. We've gotten a bunch of warnings for other weather-related things, and I feel like nothing serious has ever really happened," said San Francisco resident Jessica King.
Emergency management officials are reminding people to take the National Weather Service alerts seriously.
"It's not fun to be woken up at 5:50 a.m., and it's alarming, and it's unsettling, but the reality is, in San Francisco we are trending toward more frequent extreme weather events," said Jackie Thornhill, deputy communications officer for San Francisco's Department of Emergency Management. "These alerts are based on very objective criteria and weather modeling, and they are only sent when there is a significant probability of a life-safety hazard happening. And the scenes that you've seen throughout the city today exemplify those life-safety hazards."
And as for incidents like Saturday morning's alert, emergency officials are directing people to the basement.
"We totally understand that in San Francisco, a lot of people don't have access to a basement. So, in those situations, in the event of a future tornado warning, the next best thing is an interior room away from windows on the lowest floor possible," Thornhill said.