Document the situation
Take photos and keep notes about the source, affected areas and steps taken to prevent additional damage.
Mitigation and coverage are different questions
A property may need prompt drying even while coverage is still being evaluated. Ask the insurer what documentation it wants and what your policy requires.
Avoid assuming a specific cause is covered
Policies can distinguish among sudden plumbing events, maintenance issues, seepage, backups, stormwater and other causes.
Ask your insurer direct questions
Useful questions include what deductible applies, whether emergency mitigation is addressed, what documentation is required and how repair estimates should be handled.
Talk through the situation by phone
Describe the source of the water, the affected area and whether the water is still entering the property.