Look under sinks, confirm toilets stop running, clear vulnerable drains, and know the main shutoff location. For a longer trip, consider shutting off the domestic water if appropriate for your home and equipment. Keep heat set safely in winter and ask someone trusted to check the property.
Start with what you can observe safely
Useful details include which fixtures are affected, whether the symptom is constant or intermittent, and what changed just before it began. Photos can help document visible water or corrosion. Never enter a flooded area near electrical equipment, force a stuck valve, or dismantle pressurized plumbing.
When to call a plumber
Professional help is appropriate when water cannot be controlled, a problem returns after a basic cleaning or reset, several fixtures are affected, finishes are becoming wet, or you are unsure whether continued use is safe. Early attention often preserves more repair options.