5000 9th Avenue S.
Great Falls, MT 59405
Phone: 406.453.3923
Toll Free: 800.310.3923
In State OnlyFax:406.453.3949

 

What To Do When Wildfire Season Hits

The Wildland/Urban Interface Problem wildfires occur regularly. Whether started by humans or by lightning, they are part of a natural cycle that helps to maintain the health of our forests. Today, more than ever, people are moving into remote areas, with the desire to "get back to nature," without addressing the dangers that exist around them. A tremendous wildfire danger exists where homes blend together with the wildland, creating the wildland/urban interface. The addition of homes there interrupts the natural cycle of wildfires. Ultimately, this contributes to a dangerous build-up of old vegetation, leading to an uncontrollable wildfire. In a wildfire, your local fire department has two priorities – to remove you and your family from harm’s way and to stop the progression of the wildfire. If your home happens to be in the wildfire’s path, they may or may not be able to protect it – there are simply no guarantees. Consequently, you must take action before a fire starts.

How Your Home Catches Fire
Conditions must be just right for a wildfire to start and spread. Specifically, fuel, weather and topography work together to determine how quickly a wildfire travels and at what intensity.

Fuels
The two basic fuel types in the wildland/urban interface are vegetation and structures. Vegetation Fuel in its natural form consists of living and dead trees, bushes and grasses. Typically, grasses burn more quickly and with less intensity than trees. Any branches or shrubs between 18 inches and 6 feet are considered to be ladder fuels. Ladder fuels help convert a ground fire to a crown fire (tree tops) which moves much more quickly. one structure to another.

Weather
High temperatures, low humidity, and swift winds increase the probability of ignitions and difficulty of control. Short and long- term drought further exacerbates the problem.

Slope
Slope is the upward or downward incline or slant of terrain. For example, a completely flat plain represents a 0% slope and a hillside that rises 30 feet for every 100 feet horizontal distance represents a 30% slope. Hot gases rise in front of the fire along the slope face, pre-heating the up-slope vegetation, moving a grass fire up to four times faster with flames twice as long as a fire on level ground. There are three ways that the wildfire can transfer itself from the natural vegetation or other burning homes to your home – through radiation, convection or firebrands.

Radiation
Wildfires can spread to your home by radiating heat in the same way a radiator heats your rooms in the wintertime. Radiated heat is capable of igniting combustible materials from distances of 100 feet or more.

Convection
Contact with the convection column (flames) may also cause the wildfire to ignite your house. Typically, the convective heat column rises vertically, within the smoke plume.

Firebrands
Firebrands are burning materials that detach from a fire during strong convection drafts in the burning zone. Firebrands can be carried long distances – more than a mile – by the winds associated with the wildfire.

In all cases, your home’s building materials and design play a significant role in establishing the level of exposure that can be endured before ignition from radiation, convection, firebrands or any combination of these three.

Taking Inventory – Is Your Property at Risk?
The first step in establishing your risk is to assess your property. The table below lists numerous factors and issues that you should consider. This assessment will give you a good sense of your property’s wildfire risk.

Assessing Your Property

 

 

What You Can Do To Reduce Your Risk Homes in a wildland/urban inter- face area can be designed and maintained to increase the chances of surviving a wildfire without the intervention of the fire department.

Wildfire Protection Checklist Before, During and After

During a Wildfire

After a Wildfire Strikes