The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on ...

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the blazes.

Ash from the recent LA County fires and burn scars formed by other wildfires in the fall can be dispersed by strong winds. See an air quality map.

The cold wave maintained its grip over the region, contributing to the persistent fog. The India Meteorological Department ...

Several parts of southern California are currently under windblown dust and ash advisories as deadly wildfires continue to ...

Air quality in Metro Vancouver is not being impacted by the wildfires raging in California. According to officials, the air ...

Air quality is a big concern for everyone in Southern California, even for those who don't live near fire zones. Here are answers to some of your top questions.

The health department on January 10 issued orders to all medical officers and civic hospitals to start surveillance and ...

Windblown ash from wildfires could pose health risks across Southern California this week. Here's what you need to know.

Delhi may see light rain this week with temperatures below 20°C. Air quality remains "poor," while dense fog persists.

A Reuters analysis shows that Berkshire coal plants emit more nitrogen oxide gases than any other coal-fired fleet in the ...