Preparing For Wildfires
After experiencing a hellish wildfire season last summer and fall in the U.S., a huge conflagration in the Canadian province of Alberta has us thinking again of wildfire preparedness. The wildfire in our northern neighbor’s territory has burned 400,000 acres so far and destroyed or damaged 1600 buildings. Two have died in a car crash while attempting to escape the flames, which has caused the evacuation of 100,000 people. The grid is damaged, the water undrinkable, and even local firefighters are seeing their homes burn to the ground.
In a news conference today, authorities state that, although the spread has slowed, the fire might continue to burn for months and threatens the neighboring province of Saskatchewan. The region affected is the heart of Canada’s oil industry, with the third-largest reserves in the world. A quarter of the country’s oil production has been suspended, leaving questions about the effect the natural disaster will have on Canada’s economy.
Many people are concerned about disasters that threaten their way of life, and wildfires should be high on the list in many areas. But how can you protect your property from being devastated by fire? Two main principles are 1) vegetation management and 2) creating a “defensible space”.
An important factor in protecting your home is what we call “vegetation management”. With vegetation management, the key is to direct fires away from your house. There are several ways to accomplish this, all of which require vigilance and regular maintenance.
You’ll want to clean up dead wood and leaf piles lying on the ground close to your buildings and off the roofs and gutters. Although you may have spent time and money putting lush landscaping around your home, you may have to remove some of the vegetation close to the structure. Some people place thorny bushes by windows to deter home invaders, but these would have to go if your concern is fire protection.
You’ll want to thin out those thick canopied trees near your house, making sure that no two canopies touch each other. Any trees within 50 feet on flatland, or 200 feet if downhill from your retreat needs to be thinned, so that you’re pruning branches off below 10-12 feet high, and separating them by 10-20 feet. No tree should overhang the roof. Also, eliminate all shrubs at the base of the trunks.
Lawns and gardens should be well-hydrated; collect lawn cuttings and other debris that could be used as fuel by the fire. If water is limited, keep dry lawns cut back as much as possible (or remove them).
From a wildfire perspective, a defensible space is an area around a structure where wood and vegetation are treated, cleared, or reduced to slow the spread of flames towards a structure. Having a defensible space will also provide room to work for those fighting the fire.
The amount of defensible space you’ll need depends on whether you’re on flat land or on a steep slope. Flatland fires spread more slowly than a fire on a slope (hot air and flames rise). A fire on a steep slope with wind blowing uphill spreads fast and produces “spot fires”. These are small fires that ignite vegetation ahead of the main burn, due to small bits of burning debris in the air.
Woodpiles and other flammables should be located at least 20-30 feet away from structures. Gardening tools should be kept in sheds, and those sheds should be at a distance from the home. Concrete walkways and perimeter walls may serve to impede the progress of the fire.
Attic and other vents should be covered with screen mesh to prevent small embers from entering the structure. Additional strategies can be found at firewise.org.
ESCAPING A WILDFIRE
Of course, once you have created a defensible space, the natural inclination is to want to, well, defend it. Unfortunately, you have to remember that you’ll be in the middle of a lot of heat and smoke. Therefore, you’re probably not going to be able to function effectively unless you’re an Olympic athlete. It stands to reason that most of us will not be up to the task.
The safest recommendation, therefore, would be to get out of Dodge if there’s a safe way out. It’s a personal decision but your family’s lives depend on it, so be realistic. If you’re leaving, have that bug-out bag already in the car, as well as any important papers you might need to keep and some cash.
Before leaving, make sure you shut off any air conditioning system that draws air into the house from outside. Turn off all your appliances, close all your windows and lock all your doors. Like any other emergency, you should have some form of communication established with your loved ones so that you can contact each other. Make sure your medical kit contains some eyewash; smoke is a major irritant to the eyes.
TRAPPED IN A WILDFIRE
If your routes of escape are blocked, make sure you’re dressed in long pants, sleeves, and heavy boots. A wool blanket is very helpful as an additional outside layer because wool is relatively fire-resistant. If you don’t have wool blankets, this is a good time to add some to your storage, or keep some in your car.
If you’re in a building, stay on the side of the building farthest from the fire with the least number of windows (windows transfer heat to the inside). Stay there unless you have to leave due to smoke or the building catching fire. If that’s the case and you have to leave, wrap yourself in that blanket, leaving only your eyes uncovered. Some people think it’s a good idea to wet the blanket first. Don’t! Wet materials transfer heat much faster than dry materials and will cause more severe burns.
If you’re having trouble breathing because of the smoke, stay low, and crawl out of the building if you have to. There’s less smoke and heat the lower you go.Keep your face down towards the floor. This will help protect your airway, which is very important. You can recover from burns on your skin, but not from major burns in your lungs. For some more information about smoke inhalation, click this link to a short article: https://www.doomandbloom.net/smoke-inhalation/
BUILDING A FIRE-RESISTANT HOME
If you’re building a home in an area where wildfires are common, consider the materials that your retreat is made of. How much fire resistance does your structure have? A wood frame home with wooden shingles will go up like a match in a wildfire. You should try to build as much flame resistance into your forest retreat as possible.
You might consider building with Insulated Concrete Forms (ICFs). These are polystrene blocks made to fit together. Filled with concrete, ICFs create solid insulation that locks out sound, weather, and gives some fire resistance. Mostly used in commercial buildings and schools, constructing a home with ICFs cost a little more, but is superior to wood.
Flame-resistant roofing and siding is important, also. Asphalt shingles are used in most roofs, but there’s a fiberglass variety that offers better fire resistance. Decking can also be fire-resistant if constructed with Class A composite materials made from PVC and wood fiber. Windows using heat-reflective glass reduce the heat that enters your home in a wildfire. The heat-reflective coating acts to reduce up to 90 percent of the heat. Metal or fiber cement siding is superior to wood or vinyl products. As you might imagine, all these fire-proofing strategies come at an increased cost.
Wildfires and other catastrophes, whether natural or man-made, can threaten your life and the lives of your loved ones. Planning before the event will give you the best shot at getting through them in the best shape possible.
Joe Alton, MD
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