Rewarming procedure At the end of the 72 h cooling period, the infants will slowly rewarmed at no more than 0.5ºC /h until their temperature was within normal temperature range (36.5-37.5ºC). The overhead heater can be adjusted as needed, to rewarm the infant. The infant's temperature will be be carefully monitored for at least 4 hours to prevent rebound hyperthermia, as this might be detrimental.