Rainwater left untreated in cooling towers atop city-owned Harlem Hospital fueled the Big Apple’s deadliest Legionnaire’s disease outbreak in a decade, the Rev. Al Sharpton charged Tuesday.

A fifth person has been killed by the Legionnaire’s disease outbreak ripping through Harlem, which has also sickened more than 100 others, health officials announced.

A new lawsuit is accusing a construction company of neglecting to clean stormwater from the cooling towers behind the deadly Legionnaire's disease outbreak in Harlem.

A fifth person has died as a result of the Legionnaires’ disease outbreak in Harlem, which has sickened more than 100, health officials said.

The deadly Legionnaires’ outbreak gripping Harlem has city officials in hot water — as locals accused them Friday of dropping the ball on life-saving inspections and needlessly slow-walking revealing exactly where the disease hit.

A fifth person has died from Legionnaires’ disease in Central Harlem, according to health officials. The New York City Health Department announced updated numbers on Monday. This comes days after a fourth person died as a result of the disease.