Abstract: A monitor and control system that responds to alarm signals representing different hazardous conditions in an environment having a number of utility service supply lines, such as a home residence. One or more sensors coupled to the processor are each associated with one or more of the service supply lines. Each sensor produces an alarm signal in response to a hazardous condition attributable to an associated supply line. Each associated supply line is provided with a control device that is coupled to an output of the processor, and the processor is configured to produce one or more output signals in response to an alarm signal at a given input. Each control device is arranged to disable its associated supply line with respect to a sensed hazardous condition in response to a corresponding output signal from the processor.