A tree appears silhouetted by the raging Rim Fire in California. The fire originated on August 17. 2013.

Huge, uncontrollable fires will be the new normal in the American West, a new report finds. And housing developments closer to dry forests are exacerbating the problem.

The Washington Post reports that when fire threatens, firefighters will rush to protect homes, instead of managing fires at their sources.

"The cost is going up, and one reason is the extreme amount of resources that has to be put into putting out fires near an urban interface,” study researcher Scott Stephens, a University of California at Berkeley fire scientist, told the Post. “Having those houses there … man, that gets expensive. A fire engine every four, five or six houses, and there are hundreds of houses out there.”

Climate change is also contributing to firefighting challenges, the report found. Drought is becoming more common out West, and fire suppression efforts allow for the build-up of brush that fuels megafires.

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