A new study shows wildfires are increasingly occurring at higher elevations in the Sierra Nevada. As Amy Quinton reports from Sacramento, researchers say climate change and some forest management practices may be driving the change.
Scientists say in the early 20th century, fires rarely burned above 8,000 feet in the Sierra. But in the past three decades, several fires have burned at or above that level every year. The study suggests warming temperatures associated with climate change may be increasing tree density and the amount of fuel.