Beyond the human toll taken in lives and suffering, flood damage costs Canadian taxpayers millions of dollars annually.
Though governments at every level work to reduce the risk of floods, the first line of defence always rests with the individual. Each of us has a responsibility to protect our homes and families to the greatest extent possible. By planning ahead and taking sensible precautions, you can do your part to minimize flood damage.
Flood threats to particular areas can usually be forecast in a number of ways:
Flash or sudden flooding, in which warning time is extremely limited, can result from other causes such as earthquakes, tsunamis or tidal waves, hurricanes. violent storms or bursting of dams.
In all cases, local government authorities try to keep residents informed of developments in areas most likely to be affected by flooding. Regular media advisories will recommend actions people should take to limit or prevent disaster. As the need arises, more detailed instructions by municipal or provincial authorities will be given.
When there is immediate danger of flooding,shut off all power in your home.
Special precautions should be taken to safeguard or minimize damage to electrical, natural gas or propane heating equipment. If there is enough warning time, consult your supplier for instructions on how to proceed.
Ensure that you have a battery-powered radio in working order, with spare batteries, to listen to instructions from your local station.
Prepare an emergency survival kit that includes food, water and medical supplies in an easy-to-carry container. In addition to the battery-powered radio and spare batteries, it should contain at least the following items:
Move furniture, electrical appliances and
other belongings to floors above ground level.
Remove such toxic substances as pesticides and insecticides from the immediate area to prevent pollution.
Remove toilet bowls, and plug basement sewer drains and toilet connections with a wooden plug.
Disconnect eavestroughs if they are connected to the house sewer.
In some cases, homes may be protected by using sandbags or polyethylene barriers. But this approach requires specific instructions that must be obtained from your local emergency officials.
Vacate your home when you are advised do so by local emergency authorities. Ignoring such a warning could jeopardize the safety of your family or those people who might eventually have to come to your rescue.
When you leave, take your emergency survival kit with you.
Follow the routes specified by officials. Don't take shortcuts. They could lead you to a blocked or dangerous area.
Make arrangements for pets.
Should time allow, leave a note informing others when you left and where you went. If you have a mailbox, leave the note there.
If you are evacuated, register with the reception centre so that you can be contacted and reunited with your family and loved ones.
If you are using your car, try not to drive through flood waters. Fast water can sweep your car away. However, should you be caught in fast rising waters and your car stalls, leave it behind. Always consider your safety and the safety of others first.
Following a flood, it is important to restore your home to good order as soon as possible to protect your health and prevent further damage to your house and its contents.
Canada Mortgage and Housing Corporation has prepared the following handy checklist to help you organize your clean-up. However, this information is provided as self-help advice only.
Exercise caution when re-entering your home. Avoid electrical shock by wearing rubber boots in an area flooded with more than 5 cm (2 in.) of standing water.
Keep extension cords out of the water. If the power is on in the flooded area, shut it off immediately at the breaker box.
If conditions are wet around the breaker box, stand on a dry board and use a dry stick to turn off the switch.
Consult with your local electrical utility if you require assistance.
Make sure the building is structurally safe. Look for buckled walls or floors. Watch for holes in the floor, broken glass and other potentially dangerous debris.
Flood water can be heavily contaminated with sewage and other pollutants, and pose a serious health hazard. If through taste, colour or odour you suspect that your drinking water has been contaminated, purify it before drinking either by boiling it for 10 minutes or adding purification tablets. If you choose to chlorinate your water with a non-perfumed bleaching compound, add one drop per litre of water, or three drops per litre of cloudy water, and allow it to stand for 30 minutes before consuming.
Household items that have been flood-damaged will have to be bagged, tagged and discarded according to local regulations.
Assemble equipment and supplies, which should include:
(Note: Never mix bleach with ammonia since the fumes produced together are toxic.)
You may also need to rent extension cords, submersible pumps, wet/dry shop vacuums, a carbon monoxide sensor, and dehumidifiers, fans or heaters.
Remember to store all valuable papers that have been damaged in a freezer until they are needed.
Record details of flood damage, by photograph or video if possible. Register the amount of damage to your home with both your insurance agent and local municipality immediately
Immediately add about 2 litres of chlorine bleach to standing water.
Do not occupy a house that still containsstanding water.
Remove water from your flooded home slowly. Drain it in stages - about a third of the volume daily. If the ground is still saturated and water is removed too quickly, it could cause the walls or the floor to buckle.
Use pumps or pails to remove standing water, followed by a wet/dry shop vacuum to mop up the rest.
For instructions on how to disinfect and restore wells and cisterns, contact your local or provincial health authorities or emergency measures organization.
Do not heat your home to more than 4 degrees Celsius (about 40 degrees Farenheit) until all water is removed.
If you use gasoline-, kerosene- or propane-powered pumps or heaters, buy and install a carbon monoxide sensor. Combustion devices can produce large amounts of lethal carbon monoxide when out of tune or improperly ventilated.
Remove all soaked and dirty materials and debris. Break out walls and remove drywall, wood panelling and insulation at least 500 mm (20 in.) above the high-water line. Remove residual mud and soil, furniture, appliances, clothing and bedding.
Hose down any dirt sticking to walls and solid-wood furniture. Then rinse several times.
Wash and wipe down all surfaces and structures with chlorine bleach, ensuring there is adequate cross ventilation to remove fumes. Then rinse again. Wear a charcoal respirator (which can be obtained at major safety supply or hardware stores) when using bleach in any closed space.
Wipe down surfaces that have not been directly flood-affected using a solution of one part chlorine bleach to four parts cold or tepid water, mixed with a small amount of nonammonia dishwashing detergent. Then rinse.
Ventilate or dehumidify the house until it is completely dry. Tape clear food wrap to sections of material. If these sections are still damp inside, they will turn darker than the surrounding material. Dry until this does not occur.
Rinse, then clean all floors as quickly as possible. Replace flooring that has been deeply penetrated by flood water or sewage.
Clean all interior wall and floor cavities with a solution of water, chlorine bleach and non-ammonia dishwashing detergent and dry thoroughly.
If regular checks reveal mould, kill it with chlorine bleach. Mould can lead to serious health problems.
Carpets must be dried within two days. For large areas, hire a qualified professional to do the job. Carpets soaked with sewage must be discarded immediately.
Remove and replace all insulation materials and other articles that have been soaked, including particleboard furniture, mattresses, box springs, stuffed toys, pillows, as well furniture coverings, paddings and cushions.
Frames on high-quality furniture can often be salvaged. However, they must first be cleaned, disinfected and rinsed, then dried by ventilation away from direct sunlight or heat. Drying too quickly can cause warping and cracking.
Scrape heavy dirt from washable clothes. Rinse and wash them several times in cold water treated with one cup of chlorine bleach per washer load, and dry quickly.
Consult your lawyer to determine whether flood-damaged documents or just the information in them must be retained.
The yard area should also be cleared of all debris and refuse, which can provide a breeding ground for bacteria and mould.
Keep children away from contaminated areas during clean-up operations.
Once the flood waters have receded, you must not live in your house until several steps have been followed:
Do not use flooded appliances, electrical outlets, switch boxes or fuse-breaker panels until they have been checked by your local utility.
Whether you use a wood, gas or electrical heating system, ensure that you have it thoroughly inspected by a qualified technician before using it again. If they have been soaked, replace the furnace blower motor, switches and controls. Flooded forced-air heating ducts and return-duct pans should be either cleaned or replaced.
Replace filters and insulation inside furnaces, water heaters, refrigerators and freezers if they have been wet. However, it is often cheaper to replace this equipment.
Flush and disinfect floor drains and sump pumps using undiluted chlorine bleach. Scrub them to remove greasy dirt and grime. Clean or replace footing drains outside the foundation when they are clogged. Consult a professional for advice or service.
Any of the following food items exposed toflood waters must be disposed of:
All undamaged canned goods must be thoroughly washed and disinfected. Any cans with large dents or that reveal seepage must also be disposed of.
(A reminder: Anything that stays wet long enough will grow mould, and mould can make people sick. Dry everything quickly to avoid future health problems.)
For other self-help advice on emergency preparedness, follow instructions offered by your local emergency services or contact your provincial emergency measures organization.