New Delhi, July 18 -- President Trump threatened Friday to increase tariffs on Canada, blaming Ottawa for wildfire smoke that pushed Washington, Chicago, and Detroit to the top of global air pollution rankings. More than 850 wildfires are burning across Canada, including 483 in Ontario alone. Trump called Canada's forest management "willful negligence" on Truth Social and said he would call Prime Minister Mark Carney. No specific tariff amount was announced.

WASHINGTON - By Friday morning, the air over the US Capitol had turned the shade of dirty orange that public health agencies associate with their highest alert levels. The Metropolitan Washington Council of Governments escalated to Code Purple, the threshold beyond Code Red that heal...