Why is Casper so smoky?

PHOTOS) Smoke from Canada wildfires brings blazing orange sunset to Casper on Thursday - Casper, WY Oil City News

Why is Casper so smoky?

Why is Casper so smoky?

Colorado weather: Where's the wildfire smoke coming from?

Why is Casper so smoky?

Wyoming Fires Make Beautiful Smokey Sunrises (PHOTOS)

Massive smoke clouds, thick air darken Western US skies

How the Wildfires in Canada Could Be Affecting Your Sleep — Whether You Live Nearby Or Not

Why is Casper so hazy right now? Blame the Canadian wildfires.

High winds in forecast pose looming fire threat, B.C. Wildfire Service says, as heat wave peaks

Why is Casper so smoky?