Drought, Weather Fuel Record Oklahoma Wildfires

Wildfires fueled by gusting winds, hot, dry weather, and desiccated plant life have burned nearly 900,000 acres of Oklahoma so far this year, a record, as well as parts of Kansas and Texas. The blazes have destroyed dozens of buildings and killed seven people as well as hundreds of cattle. A chimney is all that stands in the footprint of a home destroyed by wildfires near Laverne, Okla., on March 12, 2017. Credit: REUTERS/Lucas Jackson Late winter and early spring are typically the peak wildfire season for the region, as dry, windy weather arrives before the spring green-up of crops and other plants. But this season has been particularly active because of drought conditions that have creeped up during the winter, driven by record warm temperatures and a lack of precipitation. Climate change is expected to impact many of the factors, such as precipitation, that can contribute to wildfires. But exactly how it might affect future wildfire risks in the central and southern Plains is an open question, and one that has seen relatively little attention to date. ‘A Lot of Bad Luck’ While this time of year is typically the main wildfire season for Oklahoma and surrounding areas, this season has seen a record-breaking amount of land scorched by 133 large wildfires ignited in the Panhandle and eastern Oklahoma, with conditions exacerbated by a perfect storm of ideal fire weather and a deepening drought. (Large wildfires are those covering 100 acres or more.) That drought has developed due to a combination of exceptionally warm fall and winter temperatures and a lack of precipitation. While total precipitation to date is actually close to average in the Panhandle, with a little more than 5 inches since Sept. 2 in the town of Buffalo, about 3 inches of that precipitation came during a single January ice storm, with almost nothing falling since. Temperatures, meanwhile, have been unusually warm. October through February was the warmest on record for Oklahoma; on Feb. 11, temperatures in Magnum, in the southwest of the state, hit 99°F (37°C), tying the highest winter temperature ever recorded in the state. The burn scar of the Starbuck fire around Ashland, Kan., which spread from Oklahoma to Kansas in early March. Credit: NASA/USGS Those continually warm temperatures increase evaporation during the winter season and exacerbate the drought. “That’s when we saw the large leap in drought conditions, when normally we wouldn’t see that,” state climatologist Gary McManus said. While warmer winter temperatures would normally lead to an early spring green-up, the lack of precipitation has stymied that development, leaving plenty of dead and dormant vegetation to fuel wildfires, McManus said. Winter wheat has also taken a hit…

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