The fires were triggered by a combination of record-high temperatures, drought, and high winds in the region. The situation was exacerbated, at least in Texas, by plentiful rains in recent years. The rains encouraged vegetation growth, which then dried out over the winter drought leaving more potential fuel. The unusually dry conditions have been attributed to La Niña.At Will Rogers World Airport in Oklahoma City, only of rain fell in the first two months of the year.[http://hoot.metr.ou.edu/ On January 1, fires continued to develop throughout the two states. By January 3, many of the fires were reported to be under control; but outbreaks continued through January, February, and March.