If you hear rumblings from northern Lebanon County in the next few weeks, worry not – it’s probably just the Gap.

Those who serve will be bearing the summer heat to receive training in demolitions, artillery, and mortars this month.

Here’s the training schedule at Fort Indiantown Gap for August.

Mortar live-fire training will be held Aug. 2 to Aug. 3 between 8 a.m. and 8 p.m.

Demolition training will be held Aug. 7 to Aug. 11 between 7 a.m. and 8 p.m.

Artillery training will be held Aug. 14 to Aug. 17 between 8 a.m. and 10 p.m. and Aug. 20 between 8 a.m. and 6 p.m.

Fort Indiantown Gap is the only live-fire and maneuver military base in Pennsylvania. It is considered the nation’s largest National Guard training facility by number of mandays trained – close to one million annually.

Here’s video from a previous year’s exercises.