The phrase "summer heat" refers to the warm temperatures that are typically experienced during the summer season. It is a time when the sun's rays are strongest and can cause discomfort if proper precautions aren't taken, such as wearing light clothing, using sunscreen, and staying hydrated. The heat of summer can also affect weather patterns, causing increased humidity or even heatwaves that can be dangerous to humans and animals alike. Overall, "summer heat" is a term used to describe the warm temperatures associated with the season of summer.