The Bay Area was soaked by a powerful storm system overnight into Saturday morning, causing flooding and even triggering what is reported to be the first-ever tornado warning in San Francisco, officials said.

Heavy rain and strong winds are still sweeping the Bay Area on Saturday, prompting flood watches, wind advisories and power outages across the region.

A new tool reveals a jarring, flood-filled future for the Bay Area as sea levels rise and annual storms grow more severe. Predictions from Climate Central, a nonprofit organization that studies and shares climate change information,