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Heat Islands and mortality in the elderly.

Heat waves are associated with adverse health outcomes in urban settings, but effects in potentially vulnerable populations have not been well studied. Laaidi et al. (p. 254) used a time series of 61 satellite images to produce thermal indicators of surface temperatures and diurnal temperature amplitude, with different lags between meteorological data and health impacts. The authors used health data from a case-control study of 241 people [greater than or equal to] 65 years of age who died in the city of Paris, France, or a nearby suburban area during the August 2003 heat wave. Mortality risk was significantly associated with exposure for two indicators: minimum temperatures averaged for 1 to 13 August and minimum temperature averaged on the day of death and the 6 preceding days. The results underscore the influence of night temperatures on the health impact of heat waves in urban areas. Urban heat exposure indicators based on satellite imagery have the potential to identify areas with higher risk of death, which could inform intervention decisions by policy makers.
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Title Annotation:Research
Publication:Environmental Health Perspectives
Article Type:Brief article
Geographic Code:1USA
Date:Feb 1, 2012
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