Our stomach functions differently in different seasons. It is necessary to maintain a healthy diet, especially during the summer season because in summer our digestive system is more susceptible to stomach-related ailments. Indigestion, acidity, gastritis, food poisoning, nausea, and vomiting are some of the common problems of the summer season. Dehydration is also a major problem of all diseases in the summer.
https://www.abhinavayu.com/blog/how-to-deal-with-an-upset-stomach-in-summer/