Record heatwave may have killed 500 people in western Canada

British Columbia reports jump in number of sudden and unexpected deaths' and links them to extreme weather

Nearly 500 people may have been killed by record-breaking temperatures in Canada's westernmost province, as officials warn the grim toll from heat dome" could rise again as more deaths are reported.

On Friday, British Columbia's chief coroner said that 719 sudden and unexpected deaths" had been reported over the past week - triple the number during a similar period in a typical year.