Thunderstorms with high winds could make it more difficult to contain a massive wildfire that has scorched parts of southern Colorado.

The Aspen Acres fire has surpassed 50,000 acres as evacuations spread to a wider area and the state warns residents of significant air quality issues.

A wildfire burning southwest of Denver has forced the evacuation of thousands of residents and destroyed more than 160 structures by Friday as erratic winds pushed the blaze…