A new study calculates that human-caused climate change doubled the likelihood of the tinderbox weather conditions that ...

President Donald Trump is threatening to charge tariffs to Canada over record levels of hazardous air drifting into the U.S. from hundreds of wildfires burning in the north.

President Trump touched down in Los Angeles on Tuesday evening and headed directly to his Rancho Palos Verdes golf course to ...

Republican and Democratic senators reject Trump's call for Canada to pay damages over wildfire smoke, with one calling for ...

Trump accused Canada of "willful negligence" in forest management and suggested pollution costs should be added to tariffs on Canadian imports.