...some water got into the gas?
Not a big deal.
First, if you got a lot of water in your gas tank, you would know it because the car would now be parked about a quarter mile from where you first started it up after the rainstorm. The water is heavier than the gasoline, it doesn't mix with the gasoline, and the fuel pickup is pretty close to the bottom of the tank, so after the pure water superceded the gasoline in your fuel line, the engine would have quit.
People who live in cold climates are well acquainted with moisture in the fuel. When you pull your cold (below zero) car into a warm garage, moisture condenses on the inside of the fuel tank (not so much now on newer cars with sealed fuel systems) and eventually accumulates enough that it freezes in the fuel line and fuel filter, bringing the car to a halt.
You want a product like HEET (probably not in stock anywhere in sunny California) which is simply a small bottle (half a pint, perhaps) of ethyl alcohol. Dump that in the gas tank, and it will mix with the water, and in turn mix with the gasoline, forming a combustible mixture that your car will be quite happy with (assuming we're not talking about quarts of water, here!
The HEET or just a slug of ethyl or methyl alcohol dumped into your gas tank will take care of any water that might be in there.
Alternatively, if any of your local gas stations sell gasohol, that would do the same thing.
tanstaafl.
"There Ain't No Such Thing As A Free Lunch"
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"There Ain't No Such Thing As A Free Lunch"