What is the number one cause of death in confined spaces?

Lack of oxygen is the primary cause of death in confined spaces because these environments often limit air circulation, leading to reduced oxygen levels. When an area is confined, it can become hazardous if adequate ventilation is not provided, causing occupants to breathe in insufficient oxygen. This condition can quickly lead to unconsciousness or even death if individuals are not rescued promptly. Furthermore, many confined spaces may contain other hazards that exacerbate the situation, but the immediate danger often stems from the inability to breathe properly.

While chemical exposure, electrocution, and equipment failure are significant risks associated with confined spaces, they typically do not account for as many fatalities as lack of oxygen. For instance, chemicals may pose dangers through inhalation or contact, but these hazards can often be mitigated with proper safety protocols. Electrocution might occur when equipment in a confined space is mishandled, yet it is less frequent. Equipment failure can lead to critical situations but does not usually result in the immediate life-threatening condition that a lack of oxygen creates.