The 2015 fire season got off to an unusually early start in Canada when blazes broke out in the Northwest Territories, British Columbia, and Alberta in late May. As the season has progressed, the air in western Canada—as well as large swaths of the United States—grew gray and hazy with smoke. A sharp trough in the jet stream sent a river of smoke all the way down into the Ohio Valley. You can see all of the haze in the sky, which may add an extra orange/red glow to the sun and moon. Check out the image below that shows the smoke down in Mississippi and Arkansas as well!
Image Credit: NASA
A combination of unusually warm temperatures, parched forests, lightning, and strong winds have fueled the outburst of fire. According to the Canadian government, 168 uncontrolled fires and 273 controlled fires were burning in Canada on June 29. More than than 1,300 people have had to evacuate their homes, and health officials have issued health warnings in several provinces because of the smoke.