国际研究显示夜间高温或致死亡率上升

Core Viewpoint - An international study led by the Spanish National Research Council indicates that nighttime high temperatures may lead to an increase in global mortality rates, highlighting a significant health risk associated with this phenomenon [1] Group 1: Research Findings - The study analyzed over 14 million death records from 178 cities across 44 countries between 1990 and 2018, using hourly temperature data and statistical models to assess the relationship between nighttime high temperatures and mortality [1] - Nighttime high temperatures are positively correlated with increased mortality rates in all regions except Northern Europe, indicating that nighttime heat itself is a health risk factor [1] - Nighttime high temperatures hinder the body's recovery from daytime heat stress, affect sleep quality, and may exacerbate cardiovascular, respiratory, and neurological diseases [1] Group 2: Impact on Vulnerable Populations - Urban areas with strong heat island effects, such as Mediterranean cities like Barcelona and Valencia, experience higher frequencies of nighttime high temperatures, posing greater risks to vulnerable groups [1] - The most affected populations include the elderly, individuals with chronic illnesses, and residents in poorly ventilated or air-conditioned environments [1] Group 3: Recommendations - Researchers advocate for the inclusion of nighttime high temperatures in early warning systems, the development of urban climate shelters, and the increase of green spaces to mitigate health risks [1] - Ensuring adequate cooling conditions in homes, hospitals, and nursing homes is also recommended to protect vulnerable populations from the adverse effects of nighttime heat [1]