Water Damage at Home: What to Do in the First 48 Hours

Published September 25, 2026 · Water damage and mold

After water damage, act fast to limit harm and prevent mold. Your first steps within 48 hours are crucial for drying wet areas, assessing damage, and deciding if you need professional help.

Immediate Steps After Water Damage

Your safety is the most important thing. Before you do anything else, make sure the area is safe. Water and electricity can be a dangerous mix. If the water is near electrical outlets or appliances, turn off the power to that area at your home’s main electrical panel. If you are unsure how to do this safely, or if the water is deep, do not enter the area. Call a qualified professional for help.

Contaminated water, such as from a sewage backup, also poses health risks. If the water is from sewage or is otherwise dirty, avoid contact with it. You should get help from a qualified professional immediately in these situations.

Once the area is safe, take these steps:

• Stop the water source: Find where the water is coming from and stop it. This might mean turning off a leaking pipe or closing a window during a storm.
• Remove standing water: Use buckets, mops, or towels to get rid of as much standing water as you can. A wet/dry vacuum can also be very helpful.
• Move items: Take out wet furniture, rugs, electronics, and other belongings from the damaged area. This helps them dry faster and prevents more damage.

Drying Your Home to Prevent Mold

Quick drying is key to stopping mold. The U.S. Environmental Protection Agency (EPA) says that if wet or damp materials are dried within 24 to 48 hours after a leak or spill, mold will not grow in most cases. This 24 to 48-hour window is very important.

Here’s how to dry out your home:

• Increase airflow: Open windows and doors if the weather outside is dry and not humid. This helps air move through your home.
• Use fans and dehumidifiers: Place fans to blow air across wet surfaces. Dehumidifiers pull moisture out of the air, which speeds up drying. You can rent these if you don’t own them.
• Remove wet materials: Take out wet carpets, rugs, padding, and damaged drywall. If these items stay wet, they can quickly grow mold. These materials may need to be removed or replaced if they cannot be dried quickly and thoroughly.
• Clean and disinfect: After drying, clean all hard surfaces with a mild detergent and water. This helps remove any dirt or residue from the water. For safety, never mix chlorine bleach with ammonia or other cleaning products, as this can create toxic fumes, warns the EPA.

Assessing Damage and Documenting

It is important to document all damage. This information can be very helpful if you need to file an insurance claim.

• Take photos and videos: Use your phone or a camera to take clear pictures and videos of all damaged areas and items. Do this before you start cleaning or removing anything.
• Make a list: Write down all damaged items. Include details like what they are, where they were, and what kind of damage they have.
• Contact your insurance company: Call your homeowner’s insurance provider as soon as possible. They can tell you what your policy covers and what steps you need to take.

When This Advice May Not Fit

Sometimes, water damage is too much for you to handle on your own. You should get help from a qualified professional in these situations:

• Large moldy areas: The EPA suggests getting professional help when the moldy area is more than about 10 square feet. This is roughly a 3 foot by 3 foot patch.
• Extensive water damage: If water has soaked into walls, floors, or other parts of your home’s structure, or if the damage is severe, you may need professional help.
• Contaminated water: If the water came from sewage, a flood from outside, or is otherwise dirty, it can contain harmful bacteria or chemicals. A qualified professional has the right equipment and training to clean this safely.
• Heating and cooling system: If your home’s heating or cooling system (HVAC) may be contaminated by water or mold, the EPA suggests getting professional help. Do not try to clean it yourself.
• Structural damage: If you suspect water has damaged the main support parts of your home, such as beams or foundations, a qualified professional should inspect it. Do not attempt to fix structural issues yourself.
• Electrical problems: If water has affected your electrical system and you cannot safely turn off the power, do not try to fix it. Call a qualified electrician.
• Roof damage: If the water came from a damaged roof, a qualified professional should handle roof repairs.
• Hazardous materials: If you think the water has disturbed materials like lead paint or asbestos, do not try to clean it yourself. These materials require special handling by trained professionals.
• Gas lines: Never try to work on gas lines or appliances yourself. If water damage is near gas lines, call a qualified professional immediately.

Choosing a Water Damage Restoration Professional

If you need professional help, choosing the right company is important. These companies specialize in water extraction, drying, and cleaning after water damage.

Here are some tips from the Federal Trade Commission (FTC) for choosing a contractor:

• Get written estimates: Ask several different companies for a written estimate of the work. The FTC notes that the company with the lowest price may not always be the best choice. Look for a company that explains their process clearly and answers your questions.
• Check licenses and insurance: The FTC advises considering only contractors who are licensed and insured. Confirm their license with your state or local government. Ask the contractor for proof of insurance. This protects you if something goes wrong during the repair work.
• Understand the process: Ask the professional to explain what steps they will take to dry and restore your home. A good contractor will clearly outline the work, the timeline, and the costs involved.

Remember, even if mold is killed by cleaning, the EPA notes that dead mold can still cause allergic reactions. So, mold must be removed, not just killed.