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 fifth New Yorker has died in the Legionnaires’ disease outbreak in Harlem, city health officials said.

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

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.

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.