I live in a very humid place where storms are frequent. Hurricanes are fairly common in Florida and also afternoon thunderstorms in the summer. Mold can be a problem. If one keeps a tidy and clean home, and mops up (until dry) any water or other fluids, mold should NOT be a problem. What happens here is that if we get prolonged, heavy rain, water seeps into and under the roof, and then eventually makes it way inside the home. THAT is when mold can get a foothold. One thing that can help is buying a dehumidifier. Thats what I did after Florida got hit with 2 hurricanes some years back. That machine ran 24 hours a day for several weeks, and NO mold formed. I also mopped using a bit of bleach on the tile floors, and on the walls. The house needs to be renovated after this storm, since the shingle roof blew off. I am lucky that my insurance covered the damage.