While certain geographical areas have reputations as hotspots
for attracting hurricanes or tornadoes (“we’re not in Kansas anymore Toto!”) the
reality is that every region has its own propensity for various forms of
natural disasters, no matter how infrequently they occur there. Recent news
coverage of the mudslides in the west Kootenays reminds us that disaster can
strike anywhere, and anytime, and that we need to be prepared for this when it
happens. So what causes a mudslide, and how can you minimize the damage you
experience when one strikes? Mudslides are typically caused by heavy rains in mountainous
areas where vegetation is minimal (either because of human intervention, such
as clear cutting, or natural causes like wildfires). These rains cause the
debris forming the top layer of the ground to become saturated in water, and to
start pouring down slopes.
There are several health risks that mudslides can pose. For
one, the rapidity of the movement of water and debris can lead to injuries. For
another, energy, water, and sewage systems can be disrupted and damaged, and
that can lead to injury or sickness. Additionally, transit routes become
disrupted so that getting help or medical attention becomes difficult.
If you live in an area prone to mudslides, there are several
things you can do to minimize their impact on you. To begin with, survey the
area around you, and if the visual cues (mountains, clearings of land) suggest
susceptibility, get in touch with neighbours or authorities to find out about
mudslides that have occurred where you live. Also try and find out if your
community has an emergency/evacuation plan, and develop a specific plan for
your own family. Mudslides are not typically covered by basic home insurance
plans, so if you know your area is likely to get hit by them, it might be a
good idea to invest in additional protection against such a disaster.
During heavy rainfall, check with Environment Canada for
warnings they may issue. Monitor the water levels in your area to be aware of
sudden increases or decreases. Drive cautiously. After a mudslide, avoid the
site of the disaster. Check frequently with your community for updates about
the safety of your neighbourhood. Keep an eye out for injured people, and
report damaged utlity lines to your community’s authorities. As a future
measure of protection, consider getting in touch with a geotechnical expert
(who your city staff should be able to help you locate) for suggestions as to
how you may modify your property to minimize mudslide damage.
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