The World Health Organization said high temperatures this summer are dangerous to vulnerable populations forced to stay home. According to Business Insider, weather services reported the summer to be hotter and more dry than normal. The WHO said high temperatures affect the health of older people, infants, people who work outdoors and the chronically ill.They said: "Heat can trigger exhaustion and heat stroke, and can aggravate existing conditions.” The organization said those conditions include cardiovascular, respiratory, kidney or mental diseases.