Hundreds of thousands of residents across four U.S. states have been urged to stay indoors as air quality alerts remain in effect throughout the Midwest.

Oil prices held steady following a two-day rally, as rainfall helped slow the spread of wildfires that had disrupted crude production in Canada.

Oil prices climbed for a second consecutive day as supply disruptions caused by wildfires in Canada offset OPEC’s recent increase in output.

Canadian officials are bracing for difficult days ahead as wildfires continue to spread across Saskatchewan and Manitoba, fueled by an upcoming weekend of hot and dry weather.

A growing wildfire emergency in western Canada has now extended into Saskatchewan, forcing thousands of residents to evacuate their homes.