Two people were taken to the hospital Monday after exposure to ammonia vapor at an industrial compound in western Singapore [1].

The incident highlights the risks associated with chemical storage and transport in dense industrial zones, where leaks can necessitate rapid large-scale evacuations to prevent mass casualties.

Emergency responders from the Singapore Civil Defence Force (SCDF) HazMat team were deployed to 11 Fishery Port Road in Jurong [1], [3]. The SCDF received the initial call around noon local time [6]. Upon arrival, officials detected ammonia vapor and ordered the immediate evacuation of the premises to ensure public safety [1], [2].

Investigators traced the source of the leak to a pipe located in a room within the premises [4]. Once the leak was identified, the supply valve was shut off to stop the flow of the chemical [5].

Ammonia is a pungent gas that can cause severe irritation to the eyes, nose, and throat. In high concentrations, it can lead to respiratory distress, or chemical burns. The two individuals hospitalized on June 29, 2026 [2], were treated for inhalation of the vapor [1].

SCDF officials monitored the air quality in the surrounding area to ensure the vapor had dissipated before allowing personnel to return to the site. The specific cause of the pipe failure remains under investigation.

“Two people were taken to the hospital Monday after exposure to ammonia vapor”

This incident underscores the critical role of specialized HazMat response units in Singapore's industrial infrastructure. Because ammonia is widely used in refrigeration and fertilizer production, the speed of the valve shut-off and the precision of the evacuation at Fishery Port Road were essential to preventing a larger public health crisis in the Jurong district.