A haze of wildfire smoke is once again descending on Colorado, as the West continues to experience an above-average wildfire season. After “a few weeks of relatively good air quality,” the Northwest mountain region could see a “prolonged stretch of wildfire smoke conditions this week,” according to the Colorado Smoke Blog. Health officials wrote in the blog that wind could lead conditions to change rapidly in the coming days. Health officials consider that level “unhealthy for sensitive groups” and recommend that anyone showing symptoms reduce outdoor activity and go inside. Support Local Journalism DonateWildfires in Nevada and Utah are the source of the smoke, according to the Colorado Smoke Blog .