W77: Threat to breathing due to cave-in, falling earth and other substances

The group of conditions classified under the category of "Threat to breathing due to cave-in, falling earth and other substances" refer to a range of breathing difficulties or respiratory complications that could result from being trapped or buried under fallen earth and other materials, often happening during cave-ins or landslides. These incidents may block air passages, making it hard to breathe and potentially leading to suffocation. Symptoms can include shortness of breath, fast or abnormal breathing patterns, chest pain or discomfort, and a sense of panic or anxiety. The primary system affected is the respiratory system but depending on the severity and duration of the incident, other systems such as the cardiovascular system could also be adversely affected. If not promptly attended to, the condition could progress to acute respiratory distress or even death.