Air quality alerts in place across 10 states as extreme heat warnings issued in Southwest
Record high temperatures are also possible for cities like Phoenix and Tucson.
Air quality alerts are in place for portions of 10 states as U.S. officials warn smoke from hundreds of Canadian fires may become dangerous for sensitive groups.
The smoke from Canada is expected to move over Philadelphia, Baltimore and Washington, D.C., while holding over much of Pennsylvania and New York, as calming high pressure and stable winds could hold onto this haze over the Northeast through much of the week and potentially even the weekend.
There are 191 wildfires designated as "out of control" in Canada, the Canadian Interagency Forest Fire Centre (CIFF) said in an update Wednesday. Overall, there are 747 active wildfires burning in the country, according to the centre.
The National Preparedness level inside of Canada is at a five, meaning "firefighters and equipment in every jurisdiction in Canada is put to use, and international help has been requested," CIFF said.
Evacuation orders have been issues in parts of British Columbia, according to CIFF.
Meanwhile, red flag warnings are in place across five states in the West -- Nevada, Utah, Colorado, Wyoming and Idaho -- as critical fire danger conditions hold strong. Single-digit humidity and wind gusts from 35 to 55 mph are possible.
Conditions are expected to remain critical through at least Friday but may continue into the weekend as well.
Extreme heat warnings remain in place for parts of southeast California, southern Nevada and much of Arizona -- where temperatures between 108 and 118 degrees are possible through Friday.
Record-high temperatures are also possible for Phoenix and Tucson, Arizona, through Thursday, as well as Albuquerque through Friday.
Intense heat is expected to return to the Northeast, and much of the country will be feeling above-average temperatures.
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