Summer is here and we are beginning to feel the discomfort from elevated heat and humidity. This is especially true for pigs since they do not have sweat glands. Pigs need to dissipate heat through respiration (breathing), evaporation (water evaporation from the skin), convection (increased air movement), or conduction (direct skin contact with cooler surfaces). Heat stress generally results in decreased feed intake and lower weight gain. At times, it can also increase mortality, deteriorate feed efficiency, and increase water usage. This article provides practical tips to mitigate the impact of heat stress and optimize performance during the summer.