TORONTO, Nov 17 (Reuters) - Massive floods in the Canadian province of British Columbia have dumped a month"s worth of rain in two days, triggering mudslides that have destroyed several major roads and killed at least one person. read more Insurance loss estimates will not be available for several weeks, but industry experts expect the damages to be significant. Below are the 10 costliest natural disasters in Canada so far:Sources: Insurance Bureau of Canada, Public Safety Canada, Can IQ, local media reports ($1 = 1.2591 Canadian dollars)