In Mill Valley, many people are very concerned about the possibility of flooding during the incoming rainstorm. Road signs are telling people to "get prepared and be safe."
Miller Avenue has flooded a number of times before, including last February and in 1945.
The Mill Valley Fire Department has issued an alert to residents in low-lying areas to get ready. They say those people need to keep an eye on the weather and if it's been raining hard for more than an hour or two, they might want to get their car to higher ground.
For more on the Bay Area storm preparations click here.