First 24 Hours After a Flood: Plumbing and Electrical Safety Checklist
In the first 24 hours after a flood, put safety first: stay out of water that touches outlets or cords, turn power off at the breaker panel only from a dry, safe spot, shut off the main water valve if a pipe is the source, keep a flooded furnace, water heater, and air conditioner turned off, and photograph everything before cleanup. Then call licensed professionals to remove the water and inspect the plumbing, HVAC, and electrical systems before anything is restored. Thornton Plumbing HVAC and Electrical, licensed under Indiana Plumbing License PC11500008, Indiana HVAC License HH1800018, and Indiana Electrical License EC2500017, fully bonded and insured, and BBB A+ rated since 2006, responds to flooded homes across Hamilton County 24/7 and covers all three trades floodwater affects.
What the First 24 Hours Are For
Flood recovery has a few jobs that cannot wait: preventing injury, stopping more water from entering, keeping damaged systems from running, documenting the loss, and starting to dry out the home. Each one has a different clock.
- Electrical risk is highest while water is present and the system is energized.
- Equipment damage grows if a furnace, water heater, or panel is turned back on while wet.
- Mold risk rises quickly: the EPA mold course explains that, in most cases, mold will not grow if wet or damp items are dried within 24 to 48 hours.
- Insurance documentation is easiest before anything is moved or discarded.
The checklist below follows the order most homeowners need it.
Hour One: Safety Before Anything Else
- Return home only when authorities say it is safe, and avoid driving through water, as ready.gov advises.
- Stay out of standing water that touches outlets, cords, appliances, or the panel. Do not touch electrical equipment that is wet or while you are standing in water.
- If water is rising toward the home, Duke Energy advises turning power off at the circuit breaker panel or fuse box, but never touch a breaker or fuse with wet hands or while standing on a wet or damp surface. If you cannot reach the panel from a dry spot, call a licensed electrician or your electric utility.
- If you smell gas, leave the home and call your gas utility or 9-1-1 from outside. Avoid switches, flames, and anything that could spark.
- Shut off the main water valve if a pipe, toilet, or water heater is the source of the water.
- Use generators and other gasoline-powered equipment only outdoors, away from windows.
- Keep children and pets out of the area, and wear heavy work gloves, protective clothing, and boots for any cleanup.
Hours 1 to 6: Document, Call, and Contain
Document Before You Move Anything
Photograph and video the waterline on the walls, standing water, damaged belongings, and the labels on wet equipment such as the water heater, furnace, and panel. A written list of damaged items helps later.
Call Your Insurance Company
The City of Fishers advises residents to always contact their insurance company before beginning any remediation, and notes that insurers may have preferred or required vendors. That is useful advice anywhere in the area. Standard homeowner’s policies often exclude flood damage, so confirm your own coverage.
Call Licensed Professionals
A single call to Thornton at 317-697-9265 starts the response. Our basement flood water removal team extracts the water and finds the source. A failed pump is a sump pump repair, a backup through a drain is a drain cleaning and camera-inspection job, and every wet electrical component needs a licensed electrician’s inspection through our electrical panel flood damage inspection service.
Keep Damaged Systems Off
Leave the furnace, air conditioner, water heater, and any plumbing pumps off until each has been inspected. Equipment that took on water can be damaged further if it is turned back on.
Hours 6 to 24: Dry Out and Inspect
Remove the Water and Start Drying
The first step is to remove standing water, and the EPA mold course notes that fans should not be used until the water is determined to be clean or sanitary. Floodwater generally is not, so drying equipment and sequence are decisions for a technician or restoration partner. Porous materials such as carpet, insulation, and drywall that stay wet may need to be discarded, and the EPA mold cleanup guidance says to call in a professional experienced with contaminated water when sewage is involved.
Have Each System Inspected
| Equipment | What flood guidance says | Who to call |
|---|---|---|
| Electrical panel and breakers | NEMA lists molded-case circuit breakers and panelboards among items to replace after water exposure | Licensed electrician |
| Outlets, switches, GFCI and AFCI devices, NM-B cable | NEMA lists these among items to replace after water exposure | Licensed electrician |
| Furnace, air handler, outdoor AC or heat pump | AHRI advises replacing flood-damaged heating and cooling equipment | Licensed HVAC technician |
| Water heater (tank or tankless) | Burner assembly, gas valve, or controls that were submerged generally mean replacement | Licensed plumber |
| Sump pump and check valve | Test under load and replace if worn from days of continuous running | Licensed plumber |
| Private well pump and controls | EPA advises not turning on the pump until wiring is checked by a qualified electrician, well contractor, or pump contractor | Electrician and well contractor |
Our guides cover the details: signs that a panel or wiring was damaged by basement flooding, and why a sump pump cannot keep up during heavy rain. If a battery backup would have kept your pit working, see our battery backup sump pump service.
Check the Water Supply
For city water, follow notices from your water utility. For a private well, the EPA guidance for flooded wells advises not using the water until it has been tested or disinfected and not turning on the pump until the wiring has been checked. Our well service team can inspect pumps, pressure tanks, and plumbing connected to a well.
Signs a System Was Affected
- Breakers that trip or outlets that do not work.
- A musty or burning smell near the panel, furnace, or water heater.
- Rust, silt, or a waterline on equipment cabinets and burner compartments.
- A pilot or burner that will not light, or a furnace that short cycles.
- Brown, cloudy, or odd-smelling water at the tap.
- A sump pump that runs without stopping or sounds rough.
- Slow drains or gurgling after the water recedes.
DIY or Professional: What to Handle and What to Leave
| Homeowner can | Leave to licensed professionals |
|---|---|
| Photograph damage and keep a list of items | Any entry into water near energized electrical equipment |
| Shut off the main water valve if safe to reach | Inspection or restoration of the electrical panel and wiring |
| Move valuables to dry areas | Evaluation of the furnace, air handler, outdoor unit, and water heater |
| Wear protective gear and avoid contact with floodwater | Sewage backups and contaminated materials |
| Call insurance and keep receipts | Well water tests and restoration of a private well pump |
Hamilton County Context: Lessons from the August 2026 Flood
The National Weather Service in Indianapolis recorded 5.66 to 6.43 inches of rain at Carmel gauges and 4.75 to 5.48 inches at Fishers gauges over six days in mid-August 2026, and the White River at Noblesville crested at a record 24.6 feet. Basements, lower-level mechanical rooms, and outdoor equipment across the county were exposed.
Utilities differ by address: Duke Energy and NineStar serve electric customers, and each has its own reconnection procedure. Cities have their own permit and floodplain rules, so repairs in Carmel, Fishers, and Noblesville can follow different paths. Thornton’s team works in each community, including Carmel and Fishers.
If your equipment is being replaced, ask about placing it higher in the mechanical room, and see our financing page for payment options on qualifying projects. After any flood, a pre-winter check of the heating system is worth adding to the list, since our heating services team can inspect the furnace before the cold sets in.
Frequently Asked Questions: The First 24 Hours After a Flood
What should I do first after my home floods?
Put safety first. Return home only when authorities say it is safe, stay out of water that touches outlets or cords, and do not touch electrical equipment that is wet. Ready.gov gives the same guidance. Then shut off the main water valve if a pipe is the source, photograph the damage, and call licensed professionals.
Is it safe to turn the power off myself after a flood?
Only from a dry, safe spot. Duke Energy advises turning power off at the circuit breaker panel or fuse box when rising water threatens the home, and never touching a breaker or fuse with wet hands or while standing on a wet or damp surface. If the panel cannot be reached safely, call a licensed electrician or your electric utility.
When can power be restored to a flooded home?
Duke Energy states that it cannot reconnect power until the electrical system has been inspected by a licensed electrician, and that any repairs must be verified by the local building inspection authority. Other providers, such as NineStar, have their own procedures, so confirm with yours. Thornton’s licensed electricians handle the inspection and repairs.
Can I use outlets, lights, or appliances that got wet?
No. Wet electrical equipment should not be touched or used until a licensed electrician has checked it. Water that dried on the surface can still leave silt and corrosion inside, and a device that appears to work may be damaged internally.
What electrical equipment has to be replaced after flooding?
NEMA’s guidance on evaluating water-damaged electrical equipment lists molded-case circuit breakers, panelboards, switches, receptacles, GFCI and AFCI devices, and dry-location cable such as NM-B among the items to replace after water exposure. A licensed electrician evaluates each circuit and the panel.
Should I shut off the gas after a flood?
If you smell gas, leave the home and call your gas utility or 9-1-1 from outside, and avoid switches, flames, and anything that could spark. Gas appliances that were under water should be inspected by a licensed professional before they are used again, and pilot lights should not be relit by homeowners after flooding.
Is it safe to run my furnace or air conditioner after a flood?
Not until a licensed HVAC technician has evaluated it. AHRI advises that flood-damaged heating and cooling equipment be replaced rather than repaired. Our article on running the furnace or AC after a basement flood covers what to check.
Can a flooded water heater be saved?
Sometimes, if the water stayed below the burner and controls, but a unit whose burner assembly, gas valve, or controls were submerged is generally replaced because internal corrosion cannot be judged from the outside. See our article on whether to repair or replace a water heater after a flood.
Is my tap water safe after a flood?
For city water, follow notices from your water utility. For a private well, the EPA advises not to use the water until it has been tested or disinfected, not to turn on the pump until the wiring has been checked by a qualified electrician, well contractor, or pump contractor, and to contact your local health department about testing.
What should I do if sewage backed up through a drain or toilet?
Stop using water in the home, keep people and pets out of the area, avoid contact with the water, and call a licensed plumber. EPA guidance says to call a professional experienced with contaminated water when sewage is involved. Thornton extracts the water, finds the cause, and coordinates restoration partners for porous materials such as carpet and insulation.
How quickly does mold start after a flood?
The EPA mold course explains that, in most cases, mold will not grow if wet or damp items are dried within 24 to 48 hours, so speed matters. Porous materials that stay wet, such as carpet, insulation, and drywall, may need to be discarded.
Should I run fans or a dehumidifier right away?
Wait for guidance on the type of water first. The EPA mold course advises not to use fans until you have determined that the water is clean or sanitary, and floodwater generally is not. A Thornton technician or a restoration partner can tell you when and how to begin drying.
What should I photograph and keep for my insurance claim?
Photograph the waterline on the walls, standing water, damaged belongings, and the labels on wet equipment before moving anything. Keep receipts and written findings from each trade. The City of Fishers advises residents to always contact their insurance company before beginning any remediation, since insurers may have preferred or required vendors.
What does a Thornton flood response visit include?
A licensed technician checks safety first, extracts standing water, finds and repairs what let the water in, and inspects the water heater, furnace or air handler, outdoor unit, sump pump, and electrical panel. Larger Category 2 and 3 losses that need structural drying or mold remediation are coordinated with certified restoration partners. You receive written findings for your insurer.
How do I reach Thornton after a flood?
Call 317-697-9265 at any hour. Thornton provides 24/7 emergency dispatch across Noblesville, Carmel, Fishers, and Hamilton County. Response timing depends on call volume during widespread flooding, so calling early is the best approach.
When to Call Thornton
Call as soon as it is safe to do so. A licensed technician arrives prepared, begins with safety checks and water removal, finds what let the water in, and inspects the plumbing, HVAC, and electrical systems the water reached. You receive written findings and a clear explanation of what can stay in service and what should be replaced.
Why Homeowners Choose Thornton After a Flood
| What We Offer | What It Means for You |
|---|---|
| Indiana Plumbing License PC11500008 | Licensed plumbers handle pumps, drains, supply lines, gas piping, and water heaters |
| Indiana HVAC License HH1800018 | Licensed HVAC technicians evaluate furnaces, heat pumps, and outdoor units that were exposed to water |
| Indiana Electrical License EC2500017 | Licensed electricians inspect panels and wiring, the step utilities such as Duke Energy require before reconnecting |
| BBB A+ Rated Since 2006 | Third-party verified record of honest, quality service in Hamilton County |
| Fully Bonded and Insured | Zero liability for you if anything goes wrong on site |
| 24/7 Emergency Dispatch | Help at any hour, including nights, weekends, and holidays |
| Three Trades, One Team | One company for the pump, the heater, the furnace, and the panel |
| Restoration Partner Coordination | Larger Category 2 and 3 losses connected to certified drying and remediation |
Verify our licenses with the Indiana Professional Licensing Agency, review our record at the Better Business Bureau, and read what neighbors say on our testimonials.
Call Thornton for 24/7 Flood Response
Thornton Plumbing HVAC and Electrical responds to flooded homes across Noblesville, Carmel, Fishers, and Hamilton County. Indiana Plumbing License PC11500008, Indiana HVAC License HH1800018, and Indiana Electrical License EC2500017, fully bonded and insured, BBB A+ rated, and available 24 hours a day. Call 317-697-9265 and a licensed technician will begin with safety checks and water removal.
