(CNN) -- Less than a year after a tornado swept through central Alabama, killing scores of people, a debris field created by that tornado caught fire Tuesday, threatening more than a dozen houses in the town of Brookwood, an official said.
"It is currently burning 100 acres in the tornado debris field," Alabama Forestry Commission Spokeswoman Coleen Vansant told CNN.
The field was created April 27, when the powerful EF-4 tornado killed 64 people in Tuscaloosa and Jefferson counties and flattened a number of houses.
On Monday, firefighters contained a pile of burning debris that had spread, but it jumped the containment line on Tuesday in Brookwood, which has 1,483 residents and is about 17 miles east of Tuscaloosa. The fire then spread into a field of debris left by the tornado, threatening at least 20 houses, Vansant said.
Among them were some that had been rebuilt after the tornado, she said.
Dry weather, low humidity and gusty winds made the firefighters' job more difficult, she said.