Canada has recorded its highest-ever temperature as the country's west and the US Pacific north-west endure an unprecedented heat wave. A "heat dome" of high pressure parked over British Columbia broke an 84-year-old record in the village of Lytton, where temperatures soared to 46.6 degrees celsius on Sunday. The states of Washington and Oregon are also sweltering, among others in the US. Canada correspondent Laura McQuillan spoke to Susie Ferguson.