Answer:
Step-by-step explanation:
Thousands of avalanches occur in Canada each year. They happen in all regions of Canada, but are more frequent in the mountains of British Columbia, Yukon and Alberta. Avalanches can be triggered by wind, rain, warming temperatures, snow and earthquakes. They can also be triggered by skiers, snowmobiles, hikers, vibrations from machinery or construction. Avalanche facts:
An avalanche occurs when a layer of snow collapses and slides downhill.
Avalanches are caused by four factors: a steep slope, snow cover, a weak layer in the snow cover and a trigger.
Roads and railway tracks may be rerouted to reduce risks.
Safe avalanches may be triggered in dangerous snow packs.
Avalanches can travel up to 90 km/h.
After one hour, only one in three victims buried in an avalanche is found alive. The most common causes of death are suffocation, wounds and hypothermia.