Wildfire smoke was helping raise ozone to hazardous levels. No alerts have been issued, but the air quality may approach “code orange” levels again late Thursday afternoon in parts of the region, as it appears that the ozone factory will still be operating while the Canadian wildfire smoke persists in the skies over Philly.

Wildfires are burning around Canada. Here’s where wildfire smoke is across the country and how kids can protect themselves.

Canada is going to wait before enacting any further retaliation against the U.S. over higher steel and aluminum tariffs because negotiators are in talks on a new bilateral economic-and-security deal,

Prime Minister Mark Carney said Canada won’t respond immediately to the Trump administration’s doubling of steel and aluminum tariffs, and indicated that officials are in “intensive discussions” about the trade relationship between the countries.

Prime Minister Mark Carney says Canada will take "some time" on its response to increased U.S. tariffs on steel and aluminum.

The Premier of Ontario, Doug Ford, announced plans to move $30 billion in manufacturing to Canada after new U.S. steel tariffs.

Canada’s Mark Carney calls the 50-percent tariff increase ‘illegal’, while Mexico’s Sheinbaum weighs countermeasures.

President Trump signed an order Tuesday doubling tariffs to 50% on steel and aluminum imports — drawing swift criticism from officials in neighboring Canada and Mexico. Why it matters: Trump's order said the increased tariffs that took effect early Wednesday "will more effectively counter" countries that "offload low-priced,