Understanding the Synonym of Discomforted

During a hot summer day, Max was feeling quite discomforted while walking outside. The sweltering heat made him seek shade and drink plenty of water. Even though he was wearing a hat, he still felt the heat bearing down on him. He decided to stop at a nearby café to cool off. Based on this context, which of the following words is most similar in meaning to discomforted as used in this situation?