AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has up-to-date information about the wildfires, resources, data, and interactive maps to help users learn more about particular areas and how they might be affected. There's also a free AirNow mobile app.

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Los Angeles County in the US has been battling devastating wildfires for the past few days. However, astonishingly, even amidst the natural calamity, LA's air remains significantly cleaner than that of Delhi.