This disclosure pertains to a method and apparatus for monitoring exposure to high temperature and to sunlight. It can be worn by children or adults. The device comprises a temperature measuring component and a timer. The timer can be incorporated into a chronometer. The invention includes setting a time limit for exposure to the sun. It also includes activating an alarm. The alarm can be audible or visual. The alarm will alert the wearer that the selected time period of exposure to the sun has been reached. The alarm may also alert the wearer that the temperature has exceeded a pre-selected level. The device may be solar powered. The housing of the device may be water proof and shock resistant. The functions of the device may also be incorporated into a smart phone. The back of the device or inside the hinged cover can contain safety information or operating instructions.