Why is there so little urine in hot weather?

The amount of urine is not only related to the water intake (not only the water to be drunk, as long as it enters the body), but also related to temperature and exercise. In hot weather, people have to sweat to lower their body temperature. Most of the water they ingest is discharged in the form of juice, so less water is discharged in the form of urine. Therefore, it is necessary to replenish water in time in hot weather to ensure adequate sweat and avoid heatstroke. Similarly, during strenuous exercise or manual labor, sweat is discharged more and urine is reduced accordingly.