Alert - Heavy Rain Storm Coming to San Francisco. Be Prepared!

A severe winter storm is forecast to arrive in the Bay Area late tonight Wednesday, December 10th and will continue through Thursday, December 11th. 

Heavy rains with up to four inches or more is expected over a 24 hour period and strong winds could be as high as 55 miles per hour.

These conditions can lead to flooding in low lying areas including ground floors or basements. Temporary power outages are likely in some places, especially if trees fall on power lines.

We recommend you stock up on basic supplies in case you need to shelter in place especially if you live in an elevator building where the elevator stops working because of power outages. 

  • Make sure you have food, water & needed medications for yourself, your family, and your service animals or pets. 
  • Stock extra batteries for flashlights. 
  • Do not use candles for light since they can cause fires
  • Charge up your cell phone, mobility/medical device batteries and spare ones, if you have them.
  • Avoid unnecessary travel. Public transportation via MUNI, BART, AC Transit, or paratransit will probably be slower than usual and crowded.
  • If you are medically dependent on power for ventilators, pumps or others, be sure you have a battery back-up or consider moving temporarily to a building that has a generator.
  • But most importantly, MAKE A PLAN! Reach out to friends and family in case you need them to check in on you.

For information about the weather, go to:

For information about transportation updates call or go to

For updates on San Francisco's response go to:

You can also call 311 for non-emergency help and assistance.