Severe weather has always threatened human health. However, climate change is now recognized by the World Health Organization (WHO) as one of the leading global health threats of the 21st century (WHO 2009). In recent years, the many countries have experienced record-breaking summer heat. Climate change models forecast increasing India temperatures and more frequent heat waves in coming years. This scoping review summarizes research findings that characterize morbidity and mortality due to summer heat and identifies gaps in the existing research literature. Exposure to environmental heat is a significant, but overlooked, this small cross-sectional retrospective study found the incidence of illnesses due to summer heat and outcomes.