Colorado saw record warm temperatures in September, with very few late afternoon monsoon storms. The cause? It could be wildfires that burned over 1,000 miles away. “The smoke actually reduced the temperatures. That’s the one culprit I can point at that maybe interfered with the typical El Niño response,” said Klaus Wolter, a climatologist at the University of Colorado-Boulder. Wolter’s theory is that smoke from multiple wildfires that burned over 300,000 acres in the Pacific Northwest may have made it difficult for thunderstorms to form in the state.