The smoke could reach as far as Pennsylvania and Ohio on Friday. Here’s how to track its path and its effect on air quality.

Smoke from wildfires in Canada is making it harder to breathe in Ohio and several other states. Here's how long it will last and what else we know.

We now live in the Pyrocene, a proposed new geologic epoch of high wildfire activity brought about by human-caused climate change. The occurrence of extreme fire weather is now roughly double compared ...