However, one of the biggest problems caused by floodwaters is mold growth which, according to Lewis and the CDC, may take at least 48 hours before it can be completely removed. Southern California Water Damage Pros, a company that offers repairs and restoration caused by water damage in Santa Monica, Playa del Ray and other areas, knows that molds can be very dangerous because they cause respiratory ailments, allergies, and other diseases. Not only that, molds are quite resilient and can thrive in almost anywhere that has sufficient moisture and bio matter.Unfortunately, molds are often misunderstood. For one thing, not all molds are particularly harmful; itâ¤™s just that itâ¤™s very difficult to identify a relatively benign species of molds from potentially dangerous ones. For example, the dreaded black mold (Stachybotrys chartarum) isnâ¤™t always black and may even appear as greenish or whitish growths that are usually associated with harmless molds.