The lovely warm weather also requires attention to prevent it from drying out. Symptoms may include headache, dizziness, nausea, low and dark urine, muscle cramps, sunken eyes, listlessness …… Especially in older people who have less thirst, it is important to be alert to dry mouth / lips / skin, confusion, grooves in the tongue, speech problems, reduced muscle strength. And with children, crying without tears. So keep drinking water in the warm weather to prevent problems and a visit to the doctor or the hospital!