Canada: extreme ‘heat dome’ temperatures set to worsen wildfires

System - extremely rare for this time of year - likely to fuel fires that have already displaced tens of thousands of residents

Western Canada is bracing for a heat dome" weather system that will push temperatures to new records over the weekend, and is likely to worsen wildfires that have already displaced tens of thousands of residents.

Seventy-five active wildfires burned in Alberta on Thursday, with 23 listed as out of control. In some areas, oil and gas production, which typically resists weather-induced shutdowns, was briefly shuttered.