Mark Carney says firefighters worked in "some of the worst conditions imaginable" at Wainwright fire

At Canadian Forces Base Wainwright in Alberta, a grass fire that began Saturday afternoon in a training area where live ammunition was in use killed at least four soldiers and left 39 people hospitalized, 19 of them in critical condition, officials said. Powerful winds and a sudden shift pushed the flames toward troops after the military had thought the blaze was contained; the cause remains under investigation. Prime Minister Mark Carney called the incident one of Canada’s most serious peacetime disasters for its armed forces at home and ordered federal flags lowered to half-mast. He also discussed the emergency response, referring to the overnight work by military and civilian firefighters as they battled the intense, wind-driven fire. Air ambulances carried patients to several Alberta cities, and officials said some victims had severe burns.