As climate change progresses, it is causing more frequent and severe heat waves, resulting in higher indoor temperatures. Various temperature thresholds for indicating indoor overheating have been proposed in different contexts, extending from reduced comfort in buildings to subjective heat stress and onset of first or serious health problems. This study reviews these thresholds and identifies threshold values for subjective heat stress of occupants in the city of Augsburg, Germany, distinguishing between vulnerable and non-vulnerable households. Survey data from 427 private households are analysed using unpaired analysis of variances (ANOVA), t-tests and regression analysis to identify factors related to subjective heat stress at home during night-time. The findings imply that health implications during heat waves, age, local climate zones favouring the urban heat island effect and higher indoor temperature represent significant factors for subjective heat stress. A significant difference in subjective heat stress among different groups related to temperature could be identified for thresholds of 24.8 °C (people living alone) and 26.7 °C (people with chronic disease). As WHO threshold for health risk from overheating is 24 °C, people are apparently at heat-related risk without feeling that they are at risk, especially when they have chronic diseases; thus they may not see the urgency of taking adaptation measures.

随着气候变化的进行，它引起了更频繁和严重的热浪，导致室内温度升高。在不同的背景下，已经提出了各种指示室内过热的温度阈值，其范围从建筑物的舒适性降低到主观的热应激以及最初或严重的健康问题的发作。这项研究回顾了这些阈值，并确定了德国奥格斯堡市居民主观热应激的阈值，以区分脆弱家庭和非脆弱家庭。从427个私人家庭调查数据使用方差（ANOVA）的非配对分析分析，ŧ测试和回归分析，以识别与夜间在家主观热应激相关的因素。研究结果表明，在热浪，年龄，当地气候区有利于城市热岛效应和室内温度升高期间，对健康的影响是主观热应激的重要因素。可以确定，与温度相关的不同组之间的主观热应激有显着差异，分别为24.8°C（独自生活的人）和26.7°C（慢性病的人）。由于WHO对过热造成健康风险的阈值为24°C，因此人们显然处于与热有关的风险中，而不会感到自己处于危险之中，特别是在患有慢性疾病的情况下；因此他们可能没有看到采取适应措施的紧迫性。