CTV National News for Friday, July 17, 2026: Nearly 900 wildfires burn across Canada, forcing evacuations

Nearly 900 wildfires burn across Canada, with smoke spreading across much of North America, as Northern Ontario faces evacuations; Wildfire smoke continues to impact the GTA, with air quality warnings in effect as millions on both sides of the border try to cope; Canadian wildfire smoke has blanketed parts of the U.S., prompting U.S. President Donald Trump to threaten new tariffs; Floods, hail, and tornadoes have damaged 300,000 hectares in Manitoba, leaving farmers struggling through a difficult growing season.