secure access
Electricity, structure, water circulation and instructions from the authorities pass before cleaning.
17Water and habitat
After a flood: water, food and housing
After a flood, the risks are not limited to microbes: electrical current, cutting objects, chemicals and carbon monoxide can be more immediate. Rehabilitation must begin with the safety of the site.
AnswerThe essential first
In practice
The short answer
Do not enter a building that is still dangerous and follow local instructions. Avoid contact with flood water, check drinking water advisories, remove food affected by flooding, protect wounds and clean with appropriate equipment. As soon as the place is safe, clear the water and dry the materials quickly to limit mould.
reference for drying
Health authorities recommend that moist materials be dried quickly where possible.
identify foods
Products affected by flood water or without cold must be evaluated according to their packaging and storage.
01Understanding the situation
Four risks to be separated
The same water can cause several problems, but decisions are not interchangeable. Identify the risks before choosing a move.
Immediate hazard
Submerged electrical installations, fragile structures or water currents can make access dangerous. Wait for the competent authorities to approve.
Drinking water
Tap water is usable only as instructed by the distributor and local authorities; clear water may be unfit.
Food and surfaces
Flood water can contaminate packaging and surfaces. Unprotected foods or in non-watertight packagings shall be discarded.
Plaices and skin
Water can contain debris and contaminants. An exposed wound should be washed and evaluated if it is deep, dirty or worsened.
Persistent humidity
Wet materials promote mould. The cause repair and drying count more than just spot masking.
02Step by step
Restore housing in the right order
These general steps assume that access to the building is declared safe. The instructions of the rescue, the municipality and the building professionals take precedence.
Waiting for secure access
Do not cross a flooded area by vehicle or on foot. Have electricity and structure checked before entering an affected building.
Preparing protections
Wear suitable boots, gloves and eye protection; protect wounds and wash hands after contact with water or soiled objects.
Check drinking water
Check the most recent local opinion for drinks, cooking, brushing teeth and washing food. Follow the prescribed measure, which may vary depending on the contaminant.
Sort foods
Remove food in contact with raw water, non-watertight packaging and perishable foods that are poorly stored after a power outage.
Evacuate and dry
When safe, remove the water, open the windows and dry quickly. Remove porous materials that are impossible to clean and dry completely.
Clean recoverable surfaces
Wash with safe water and detergent, then apply the disinfection instructions specific to the surfaces and products used. Never mix cleaners.
Monitor the suites
Ask for advice in case of infected wound, diarrhoea, respiratory discomfort or suspicious exposure; document the damage and keep the official opinions consulted.
03Decision points
Deciding by situation
The context determines the right measure. Use these markers to choose the next action and when to ask for help.
Restricted tap water
Follow the local opinion exactly. Boiling does not remove all chemical contaminants; do not transpose a valid directive for another municipality.
Food affected by flooding
Dispose of food that is exposed to water and food that is not leakproof. For intact hermetic containers, follow the instructions of the competent food authority.
Large wet or mouldy surface
Evaluate the possibility of cleaning and drying without exposing yourself; ask for professional help if housing or health condition requires it.
Plaice or symptoms
Wash the area with safe water and soap, then consult for a deep, dirty, infected wound or a question of antitetanic recall.
04Not to be done
Frequent errors
- Enter a building before checking for electrical or structural hazards.
- Drinking water simply because it seems clear or assuming that a boil corrects any pollution.
- Keep food affected by raw water because its odour is normal.
- Operate a generator inside or near an opening.
- Paint on still moist materials or mix bleach with other cleaners.
Important limitThis guide does not replace the instructions of local authorities and relief agencies. In case of electrical danger, collapse, water current or severe symptoms, get away and contact emergency services. People with asthma, immunocompromised or respiratory disease may need to avoid cleaning moulds.
Frequently Asked Questions
Can I drink clear tap water after a flood?
Its aspect does not make it possible to conclude. Consult the water distributor's and local authorities' advisories and follow the instructions for each use.
Do I have to throw all the food out of the refrigerator?
The decision depends on time without electricity, temperature and type of food. Foods affected by flood water or that remain too hot should be discarded according to official instructions.
How long do I have to dry the house?
The CDC recommends to clean and dry quickly, ideally within 24 to 48 hours when possible and safe, to limit mould growth.
Does a wound exposed to water still require antibiotics?
No. Wash it with safe water and soap; a professional will assess the depth, signs of infection and antitetanic protection if necessary.
Check implementation
These points serve as a reminder to prepare the action. The boxes are not registered.
Sources used
These institutional references provide a means of checking the guide and accessing the full recommendations.
PratiqueCheck before deciding
Votre liste de vérification
- Faire confirmer la sécurité du bâtiment avant d’entrer.
- Consulter les consignes sur l’eau de consommation.
- Trier aliments et matériaux atteints par l’eau.
- Organiser nettoyage, séchage et surveillance des plaies.
Use alongside the guide’s steps, limitations and sources.
Folder Illustrations
Images generated by artificial intelligence to put the subject in context.
Image generated by artificial intelligence. Fictional AI-generated scene, not medical evidence or a diagnosis.