FREDERICK, Md. (AP) - The National Park Service says it's too hot for a Civil War anniversary event at the Monocacy (mah-NAH'-kah-see) National Battlefield near Frederick.
The agency said Friday it's cancelling a living-history encampment and three artillery demonstrations that were set for Sunday.
The National Weather Service is predicting a high of 96 degrees in Frederick on Sunday.
The park service says visitors can beat the heat by viewing a special exhibit and meeting local authors in the visitor center.
The Battle of Monocacy was fought July 9, 1864, along the Monocacy River. Federal troops led by Gen. Lew Wallace stopped Confederate forces led by Gen. Jubal Early from taking Fort Stevens in Washington, about 40 miles away.
The clash is known as the battle that saved Washington.