Tonouchi Michihiko
Japan Meteorological Business Support Center.
Nihon Rinsho. 2012 Jun;70(6):981-5.
The number of heat disorder patients increases according to high temperature and high humidity. Sudden heat raises the risk for heat disorder, however, the first heat spell after rainy season(called 'Tsuyu' in Japan) should be especially taken care for. In 2010 Japan experienced the hottest summer for last 100 years, and during the first heat spell, the ratio of serious patients reached to 4 to 7 percents (normally the ratio varies 0 to 4 percents). And the ratio of elderly patients increased to 60 percents. It reveals that the first and severe heat spell affected especially for elderly people, and their symptom became quite worse than normal situation.
热紊乱患者的数量随着高温和高湿度而增加。突然的高温会增加热紊乱的风险，然而，雨季（在日本称为“梅雨”）后的首个热浪期尤其需要注意。2010年日本经历了过去100年来最热的夏天，在首个热浪期，重症患者的比例达到了4%至7%（正常比例在0%至4%之间）。老年患者的比例增至60%。这表明首个严重热浪期对老年人影响尤其大，而且他们的症状比正常情况严重得多。
