A safety switch has a casing, a first circuit prong, a second circuit prong, a switch contact, a rocker, an arm and a latch. The first and second circuit prongs are mounted in and extend through the casing. The switch contact bends upward when temperature of the switch contact increases, is mounted on the first circuit prong and has a distal end selectively contacting the second circuit prong. The rocker is pivotally mounted on the casing and has a deactivating end and an activating end. The arm is formed on and protrudes down from the activating end and connects to the distal end of the switch contact. The latch is mounted in the cavity and selectively locks the arm to prevent the distal end of the switch contact from contacting the second circuit prong as the temperature drops. The safety switch may be used in severely cold environments.