Anne Arundel County police say 16 people overdosed in the span of 24 hours, three were fatal.
It was the highest spike they've seen over the last couple of years. The overdoses were all over the county, but five were in Glen Burnie.
One of the women who died was suffering from Alzheimer's Disease and took too much medication, police said.
All of the other overdoses were a result of heroin.
"We take these numbers very serious," said Anne Arundel County police spokesperson Ryan Frashure. "These are numbers that we look at every 24 hours when we come in the morning. Our commanders each morning, they sit down and review these numbers and they look at heroin overdoses and fatals if there are any and that's how they move their chess pieces around and we adjust resources if needed."
Police couldn't confirm if this is the county's highest number of overdoses, but Frashure said it stands out as one of the highest in the past couple of years.