A historic March heatwave effectively erased a month of winter, triggering a massive snow drought from the Southwest U.S. up to parts of British Columbia. CBC News’s Johanna Wagstaffe looks at what this means for the summer water supply and wildfire risk for hundreds of communities that rely on a slow snowmelt. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://