Heat Adaptation among the Elderly in Spain (1983-2018)

Area of Science:

• Environmental Health
• Gerontology
• Climate Change Adaptation

Background:

• Climate change poses risks, with the elderly being a highly vulnerable group.
• Limited research exists on long-term heat adaptation and its effects on older adults.
• Minimum mortality temperature (MMT) is a key indicator for assessing population heat adaptation.

Purpose of the Study:

• To evaluate heat adaptation in individuals aged 65 and above from 1983 to 2018 using MMT.
• To analyze the trend of heat adaptation over time in the elderly compared to the general population.

Main Methods:

• Retrospective longitudinal ecological time series study design.
• Utilized data on daily mortality and maximum daily temperatures from 1983 to 2018.
• Analyzed Minimum Mortality Temperature (MMT) as the primary adaptation indicator.

Main Results:

• Elderly populations exhibited a slightly higher MMT (28.6°C) than the general population (28.2°C), though not statistically significant.
• 62% of Spanish provinces showed evidence of heat adaptation in their elderly populations during the study period.
• Elderly individuals demonstrated an average heat adaptation trend of 0.11°C per decade.

Conclusions:

• While some heat adaptation is evident in the elderly, their vulnerability persists.
• Findings highlight regional variations in adaptation capacity among older adults.
• Further research is needed to understand long-term heat exposure effects and enhance adaptive strategies for this demographic.