The pull of the foul air to Northern California was significant enough that the Bay Area Air District issued an air quality advisory. According to AirNow, a federal air-quality measuring app that measures air quality in real time, the air quality at 8:30 a.m. through much of the region was only moderately healthy.

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.

Smoke in the sky and red sunrises were reported in the Eastern U.S., which was covered with Canadian wildfire smoke Monday morning.

As wildfire smoke drifts into the United States, it's important to know how to reduce exposure and protect yourself from air pollution and its associated health risks.

Baltimore will see some hazy skies Tuesday as smoke from dozens of wildfires burning in Canada travels over Maryland in the upper levels of the atmosphere.

Hazy skies are expected across Northeast Ohio on Monday and Tuesday as wildfire smoke from central Canada drifts southeast into the region.

Massive wildfires burning out of control in western and central Canada are forcing thousands to flee. The blazes are also sending hazardous smoke toward major cities in the United States.

Lingering wildfire smoke will become thicker in Wisconsin overnight, making it difficult to get a view of possible northern lights.