The Vernon Hills Police Department has the ability to set up an override of the Comcast cable television system. This can be done to alert residents in the event of an emergency, such as in the case of a tornado warning. When activated, the override system will make television screens go black and residents will then hear the applicable safety message from the police department. The override system is another way in which the Vernon Hills Police Department utilizes technology to quickly reach residents in the event of an emergency.