Because sweating is just the loss of water in your body, water can detoxify, but you will come back after drinking such a light glass of water.

It is easier to lose weight in summer because it is 1. In hot summer, people no longer like greasy meat food, but turn to light taste and eat more fruits and vegetables, so that the body absorbs less calories. 2. The high temperature in summer will accelerate the metabolism of human body. Compared with the cold season, faster metabolism means consuming more calories, so it is easy to lose weight in summer.