How quickly can mold grow after rain damage?« Back to Previous Page

After the heavy rains last month, I noticed a musty smell lingering in my bedroom closet. When I opened it up, I saw some discoloration on the back wall where water had seeped through from outside. Given that this has only happened since the rain, could someone explain how mold might have started growing so quickly and what tests or treatments I should consider to prevent it from recurring?