Weather

Choking smoke from wildfires burning in Canada continues to billow into the eastern U.S., where more than 100 million Americans will again experience "unhealthy" to even "hazardous" air quality levels.

Hawaii’s Kilauea volcano started to erupt early Wednesday morning, according to an alert released by the Hawaiian Volcano Observatory.

The people most at risk from wildfire smoke are individuals with lung disease, asthma, heart disease, older adults, children, and expectant mothers.

The intense Canadian wildfires are blanketing the northeastern U.S. and parts of Eastern Canada, turning the sky yellowish gray and prompting warnings for vulnerable populations to stay inside.

The tiny particles are small enough to get past airway defenses and cause breathing problems. Here's a closer look at what's happening and some precautions for dealing with the haze.

Dangerous and potentially deadly heat will plague the U.S. territory of Puerto Rico this week, thanks in part to plumes of Saharan dust that are blowing across the Atlantic Ocean from Africa.

An earthquake with a preliminary magnitude of 4.9 struck southern Haiti early Tuesday, killing at least four people and injuring 36 others, authorities said.