Air quality plummets in Boston, Toronto as thick wildfire smoke shrouds the sky for millions Smoke from wildfires burning in Ontario have caused air quality to reach unhealthy levels across Canada, ...

Roman’s data will be accessible to the public immediately after it’s collected and processed, which is uncommon for most missions, Choi explained. "Usually there's a proprietary period where there is ...

Cleanup crews fanned out across Philadelphia on Sunday after a series of powerful microbursts tore through the region, toppling trees, damaging buildings and blocking streets with massive trunks and ...

The sizzling, stormy start to July will continue into another week as the risk of severe thunderstorms and flash flooding shifts across the central and eastern part of the nation, according to ...

Daily rounds of rain and thunderstorms will blossom across the South this week, raising the risk for flooding, AccuWeather meteorologists warn. The combination of tropical moisture surging northward ...

Pacific poised for tropical surge as Atlantic shows signs of activity Atlantic tropical activity has been limited so far this season, but that may soon change as the Gulf shows signs of life.

"We have to show that we will answer the question from those mothers: help is coming," Fletcher added. "Let's demonstrate that global solidarity is as strong as ever and that we will stay the course." ...

Major snow, ice storm to affect more than 150 million people in southern, eastern US A massive winter storm is set to spread heavy snow and ice across more than two dozen states, threatening travel, ...

Dangerous heat to reach from Salt Lake City to Minneapolis, Philadelphia While the worst of the heat dome this week will focus from the northern part of the Rockies to the Midwest, up to a few days of ...

Heat dome to broil western US ahead of North American monsoon A new heat dome is building in the United States this week. This time it will focus on the West first, then shift toward the Midwest.

First storms of summer to arrive in southwestern US as monsoon begins The upcoming North American monsoon will help to snap the surge of triple-digit heat over the interior West, and may bring ...

Storms, heat and flooding disrupt United States' 250th birthday celebrations A deadly heat wave, followed by severe weather, left hundreds of thousands without power, delayed the Washington, D.C., ...