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The term "limited access zone (warm)" is best described as the area where personnel who support the incident are located. This zone typically serves as a transitional area between the hot zone—the location of the active incident—and the cold zone, where the command post and other support operations occur.
In the warm zone, responders may be engaged in activities that require some level of personal protective equipment (PPE), but they are not engaged in direct operations within the hazardous environment of the hot zone. This area is critical for personnel who need to be close enough to assist with operations but still require some protection from potential hazards.
Positioning the command area for emergency responders in the cold zone helps to ensure that there's a clear distinction between different levels of risk involved in the various zones surrounding the incident. The warm zone is carefully controlled to ensure only those personnel who have the appropriate training and equipment may enter. Thus, it supports operational effectiveness while maintaining safety protocols for all responders involved.