It is well known that in order to remove excess heat in an environment, a temperature lower than body temperature, i.e. less than 37 0C is needed. If such modalities of heat removal do not exist, the organism would be overheated, the internal temperature would rise, and above 42 0C, all proteins in the human body would be coagulated and finally heat shock would be produced. When atmospheric humidity is very high, one looses heat with more difficulty, and increased temperature is harder to endure, the air seems to be unbreathable. Some categories of sick people, for example, people suffering from asthma, heart condition, hypertension, with endocrine diseases (hyperthyroidism, hypothyroidism or with suprarenal problems), as well as people with obesity problems are substantially affected by increased humidification of air in canicular days.