New Delhi, July 19 -- Smoke moving south from the massive Canadian wildfires is expected to ease over the New Jersey region ahead of Sunday's FIFA World Cup final between Spain and Argentina, with meteorologists saying thunderstorms moving through the area should help improve air quality before kickoff.

Although conditions are forecast to improve around the New York/New Jersey Stadium, air quality alerts remained in place on Saturday across large parts of the United States as wildfire smoke continued to spread beyond the Canadian border.

United States President Donald Trump, who is expected to attend the World Cup final, once again blamed Canada for the smoke affecting American cities.

Trump also warned that tariffs could be considered...