Canada is still vulnerable to such catastrophes, many of which have been or will be as serious as any occurring elsewhere in the world. It is also true that the cumulative effects of minor but frequent disasters can sometimes cause more damage and have as much impact on the population as one major catastrophe.
Natural disasters have a wide variety of causes.
Natural disasters can strike with lightning speed or they may build up over a long period of time. Their arsenal includes water, fire, air, earth, and they are aided by cold, heat, gravity and other powerful forces of nature.