Free Sandbags
Most state and local cities offer free sandbags at the department of public works for most municipalities.
For the San Francisco Bay Area we have a list click here.
I can send you some sandbags for a small shipping and handling fee of $10 dollars and I will send you 10 sandbags.
We also recommend the use of a plastic sheet and duct tape to cover the sandbags and improve the water resistance from flooding and damaging your property. Please visit our American Hardware Store green home improvement products.
Need help filling the sandbags check out our link with Home Advisor for Day Labor.