Authorities investigating the cause of a wildfire that destroyed more than 1,000 buildings last month in Colorado are looking at the possibility that the blaze is linked to underground coal fires have long smoldered at old coal mines in the area
DENVER (AP) A fire raging in an underground Colorado coal field in 1883 sent so much smoke pouring from cracks in the ground that the scene was likened to burning volcanoes and the state's first mining inspector deemed the blaze “impossible to extinguish.”