A 7-year-old told her bus driver she couldn’t wake her parents. Police found them dead at home.

For more than a day, the 7-year-old girl had been trying to wake her parents.

Dutifully, she got dressed in their apartment outside Pittsburgh on Monday morning and went to school, keeping her worries to herself. But on the bus ride home, McKeesport, Pa., police say, she told the driver she’d been unable to rouse the adults in her house.

Inside the home, authorities found the bodies of Christopher Dilly, 26, and Jessica Lally, 25, dead of suspected drug overdoses, according to police.

Also inside the home were three other children — ages 5 years, 3 years and 9 months.

The children were unharmed but still taken to a hospital to be checked out, then placed with the county’s department of children, youth and families.

The case cast a light on Allegheny County’s epidemic of drug overdoses — and their impact on families.