With 174 active wildfires burning across Canada, several U.S. states are under air quality alerts due to the traveling smoke from these flames.

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United ...

Nearly a dozen states in the northern U.S. may have an opportunity to see the northern lights Sunday as geomagnetic storms ...

Solar flares can affect us on Earth, and radiation from this flare caused a shortwave radio blackout. A map released by the ...

An air quality map shows conditions improving ... alerts and advisories in several states this week. Some areas near the border with Canada — including northern Minnesota, parts of Michigan ...

may be visible in northern states, according to the NOAA. Most of Canada will also have a chance to see the lights. While the likelihood of seeing the northern lights will be low for most of the ...

Tuesday’s auroral forecast follows “minor” geomagnetic storms that disrupted Earth’s magnetic field over the last two days, ...