Safety is the absolute priority; never enter a flooded basement until the power has been disconnected. Once the area is electrically safe, identifying the source is critical—whether it’s a failed sump pump or groundwater surcharging through foundation cracks. At Basement Expert, we recommend immediate extraction to stop moisture from “wicking” into drywall and framing, which can lead to mold colonization within 24–48 hours in our humid PNW climate.