Immediately. The sooner you stop the water source, remove standing water, and begin drying, the better your chances of reducing damage and preventing mold growth. Even a few hours can make a difference.

Minor spills may be manageable, but larger water losses often require professional equipment to remove hidden moisture from walls, flooring, and structural materials. If water has soaked into building materials or comes from a contaminated source, professional restoration is recommended.

Under the right conditions, mold can begin growing within 24 to 48 hours after water damage. Acting quickly to dry affected areas is one of the best ways to reduce the risk of mold developing.

It depends on the extent of the damage. If the damage appears significant or may exceed your deductible, contact your insurance company promptly and document everything with photos and notes. If you're unsure, a professional restoration company can often help assess the damage and explain what information will be useful when filing a claim.