Air it out and then put in a plastic bag or container with the dehydrating packets. Or run the air conditioner so that the water evaporated faster. I am sure others will jump in with more suggestion. All is not lost. At worst you will have to have a CLA, but if you can dry it out quickly you can avoid that as a necessity.
By the way there are under water cases for scuba diving with a Hasselblad. I thought you would like to know for the future.