In explosion scenarios, what does the term "overpressure" refer to?

The term "overpressure" specifically refers to the increase in pressure that occurs over atmospheric pressure during an explosion. When an explosion happens, it generates a shock wave that causes a rapid increase in pressure in the surrounding environment. This is the "overpressure" that can lead to significant damage, as it exceeds normal atmospheric pressure and can affect structures, equipment, and personnel within the vicinity of the explosion.

Understanding overpressure is crucial in evaluating explosion hazards, as it helps in assessing potential impacts on safety and design considerations for buildings and facilities susceptible to blast effects. The damage caused by overpressure is a key factor in determining the necessary safety measures and response protocols in the event of an explosion.