On Sunday afternoon, FDNY firefighters responded to a call about a manhole fire on Cortelyou Road in the Flatbush neighborhood of Brooklyn. Upon arrival, crews detected elevated levels of carbon monoxide inside the adjacent building that spans Ocean Avenue and East 21st Street.

Why carbon monoxide is a serious threat

Carbon monoxide (CO) is a colorless, odorless gas that can be fatal when inhaled in sufficient quantities. Because it binds to hemoglobin more readily than oxygen, it prevents the blood from delivering oxygen to vital organs. Even low-level exposure can cause headaches, dizziness, and nausea, while higher concentrations can lead to loss of consciousness or death.

FDNY’s precautionary evacuation

Following standard safety protocols, FDNY personnel cleared the building as a precautionary measure. Residents were escorted out of their apartments and gathered at a nearby safe location while the fire department conducted air quality testing and determined the source of the gas.

Officials confirmed that no injuries were reported during the evacuation. The department continued to monitor the situation, ensuring that the carbon monoxide levels returned to safe limits before allowing residents to re‑enter their homes.

Community impact and next steps

The incident underscores the importance of regular maintenance of heating systems, water heaters, and any appliances that burn fuel, as these are common sources of carbon monoxide leaks. Residents are encouraged to install carbon monoxide detectors in their homes and to test them regularly.

FDNY reminded the public that any suspicion of a gas leak or unusual symptoms such as headaches or nausea should prompt an immediate call to 911. Prompt action can prevent serious health outcomes and ensure the safety of families and neighborhoods.

Local response

Flatbush community leaders praised the swift response of FDNY, noting that the department’s quick action helped avoid potential harm. The building’s management has been asked to cooperate with city inspectors to identify the cause of the elevated CO levels and to implement any necessary repairs.

As of the latest update, the building remains temporarily vacant while officials complete safety checks. Residents will be notified when it is safe to return.

Original reporting: Brookhaven News – ABC7 New York — read the source article.