Basement Water Damage Guides · Basement Water Damage Guides

What to Do First When You Find Water in a Basement

What to do first water in basement homeowners find is a question with a clear answer: safety comes before everything else, and the first steps are about staying out of the water rather than dealing with it. A flooded basement can hide submerged outlets and panels, and water and electricity together are dangerous, so the first move is not to go down and look, but to stay on dry ground and keep everyone else there too. The water can wait; the safety steps cannot.

📞 Call Now — (877) 624-0105 All Basement Water Damage Services

✓ Written for California homeowners
✓ Visit first, then a plan
✓ Call to arrange a visit

Basements are uncommon across most of California, and they exist mainly in older homes and some hillside areas, so these first steps apply to a smaller group of homes. For those homes, though, knowing the first steps before water appears is worth more than learning them while standing at the top of a flooded stairway. The [basement flooding cleanup](/basement-flooding-cleanup/) page describes the cleanup service in general terms.

Stay out of the water

The first step is to stay out of the water. Never enter a flooded basement, because submerged outlets, panels, and appliances make the water dangerous, and the depth can be hard to judge from the top of the stairs. Floodwater is not safe water, so contact with it should be avoided for any reason, including trying to save belongings or to find the source of the leak.

Keep children and pets away from the basement door, and close the door if you can do so from dry ground. Do not send anyone down to look, and do not try to wade in to switch something off. The water will still be there when a professional arrives, and the room is not worth the risk.

Shut off the water only if safe

If the water is clearly from plumbing, shut off the water main if it is safe to do so from a dry place. The shut-off is usually outside the home or at a point on dry ground, and it should never be reached by wading through standing water. If the shut-off is in the flooded basement itself, do not go down to reach it; leave it and call a professional.

If the water is from rain, shutting off the water main will not stop it, and the useful step is to keep the household away from the room and call a professional to arrange a visit. Do not touch electrical items, switches, or outlets in standing water under any circumstances.

What to Do First When You Find Water in a Basement — California basement water damage guide

Do not touch electrics in standing water

Do not touch electrical items, switches, or outlets in standing water, and do not touch a panel that water has reached. Water and electricity together are dangerous, and a switch that looks dry from above may be wet below. If the power needs to be shut off, do it only from a dry place and only if it is safe to do so; otherwise leave it and call a professional.

Unplug nothing that is standing in water, and do not try to move an appliance that is wet. The electrical safety rule is absolute: no item, however valuable, is worth touching while it is in contact with floodwater. A professional can deal with the electrics once the water has been removed.

Note what you can see from safety

From a safe, dry place at the top of the stairs, note what you can see: where the water is, how deep it looks, whether it is still rising, and whether it followed rain or appeared on a dry day. Note the time you found it, and whether any appliance or pipe nearby looks involved. Those observations are the most useful thing a homeowner can do in the first minutes.

Take photographs from a safe, dry place, because a record of the water level and where it appeared is useful later. Do not go down into the water to take a closer photograph. The record you make from the stairs is enough, and it keeps you safe while you make it.

Keep the household away

Keep the household away from the flooded room, and that includes children and pets, who may not understand the danger. Close the basement door if you can do so from dry ground, and tell everyone in the home that the room is out of bounds until a professional has dealt with it. A child or a pet that wanders into a flooded basement is in danger from the water and from the electricity in it.

If the home has a rental tenant, a lodger, or a visitor, tell them too. The safety rule applies to everyone in the home, not only to the person who found the water. A clear instruction, given once, is better than a warning given after someone has already gone down.

Call a professional to arrange a visit

Call a professional to arrange a visit, and describe what you have noted: where the water is, how deep it looks, whether it is still rising, and whether it followed rain or appeared on a dry day. That description helps a cleanup company understand the situation before it arrives. The [basement flooding cleanup](/basement-flooding-cleanup/) page describes the cleanup service in general terms.

While waiting, move belongings that are on dry ground away from the stairs and the basement door, so that water cannot reach them if it rises further. Do not carry items out of a flooded room. The belongings that matter most are the ones that are still dry.

Key Takeaways

The first step is to stay out of the water.
If the water is clearly from plumbing, shut off the water main if it is safe to do so from a dry place.
Do not touch electrical items, switches, or outlets in standing water, and do not touch a panel that water has reached.
From a safe, dry place at the top of the stairs, note what you can see: where the water is, how deep it looks, whether it is still rising, and whether it followed rain or appeared on a dry day.
Keep the household away from the flooded room, and that includes children and pets, who may not understand the danger.
Call a professional to arrange a visit, and describe what you have noted: where the water is, how deep it looks, whether it is still rising, and whether it followed rain or appeared on a dry day.

Your Next Step

If this guide matches what you found at home, the next step is a visit — not a guess. Call and describe what you found, and the visit is arranged from what you describe. The Basement Flooding Cleanup page explains what that service covers, the Basement Flooding Cleanup page covers a related part of the job, and the services hub lists every service in one place.

While you wait, do not enter a flooded basement and do not touch switches, plugs or appliances in standing water. Floodwater is not safe water — keep pets and children clear of it.

Keep the guides on this site bookmarked: the first guide, the signs guide, and the preparation guide cover the checks worth repeating — after moving in, and after heavy rain.

Basement water damage help is available across California. See basement water damage cleanup in Vallejo, CA for one local example, or find your town on the service areas page.