JACKSON, Wyo. (AP) — The wildfire season this summer in Yellowstone is being called the worst in decades.

A larger percentage of Yellowstone National Park burned this summer than in any year since 1988. The wildfire season of 2003 was also one of the worst in terms of drought and acreage burned.

According to the Jackson Hole News and Guide , a dry spell that began in mid-July left ignitable fuels on forest floors.

The cost of fighting the wildfires in the region will run tens of millions of dollars.