Where Does the Water Come From?
Standing water can come from runoff, groundwater, plumbing leaks, or more than one source. The timing and location of water provide useful context, but they do not prove a cause.
Collection Is Only Part of the Plan
A useful drainage approach considers where water enters, how it can be collected, and where it can be safely discharged. A sump pump may be part of that approach, but cannot replace understanding the water pathway.
What a Dehumidifier Does Not Do
A dehumidifier manages humidity in the air. It does not remove standing water or repair a plumbing leak. Humidity management and drainage can be complementary, but solve different problems.
Prepare for an Assessment
Record whether water follows rainfall and describe the affected area. Do not handle electrical equipment in wet conditions or enter an unsafe crawlspace.