What is the recommended action if ammonia vapor is present indoors?

Evacuating the building is the most prudent action when ammonia vapor is present indoors due to the significant health risks associated with ammonia exposure. Ammonia is a toxic gas that can cause severe respiratory issues, eye irritation, and other health symptoms, especially in enclosed spaces where the concentration can rise rapidly.

In situations where ammonia is detected, the priority is to remove individuals from the hazardous environment to ensure their safety. Evacuation minimizes the risk of inhaling harmful levels of ammonia, which can lead to serious health consequences. While actions like opening windows for ventilation may seem beneficial, they might not effectively mitigate the danger, particularly if the ammonia concentration is high.

Other suggested responses, such as covering the nose and mouth with a cloth or turning off electronic devices, do not address the immediate danger of ammonia exposure and may offer a false sense of security. Ultimately, the most effective and safe course of action is to evacuate the building to protect everyone present from the harmful effects of ammonia vapor.