Variation of daily warm season mortality as a function of micro-urban heat islands
Open Access
- 14 April 2009
- journal article
- research article
- Published by BMJ in Journal of Epidemiology and Community Health
- Vol. 63 (8), 659-664
- https://doi.org/10.1136/jech.2008.078147
Abstract
Background: Little attention has been paid to how heat-related health effects vary with the micro-urban variation of outdoor temperatures. This study explored whether people located in micro-urban heat islands are at higher risk of mortality during hot summer days. Methods: Data used included (1) daily mortality for Montreal (Canada) for June–August 1990–2003, (2) daily mean ambient outdoor temperatures at the local international airport and (3) two thermal surface images (Landsat satellites, infrared wavelengths). A city-wide temperature versus daily mortality function was established on the basis of a case-crossover design; this function was stratified according to the surface temperature at decedents’ place of death. Results: The risk of death on warm summer days in areas with higher surface temperatures was greater than in areas with lower surface temperatures. Conclusions: This study suggests that measures aimed at reducing the temperature in micro-urban heat islands (eg, urban greening activities) may reduce the health impact of hot temperatures. Further studies are needed to document the variation of heat-related risks within cities and to evaluate the health benefits of measures aimed at reducing the temperature in micro-urban heat islands.Keywords
This publication has 18 references indexed in Scilit:
- Prediction of the indoor temperatures of an urban area with an in-time regression mapping approachJournal of Exposure Science & Environmental Epidemiology, 2007
- Relation between Elevated Ambient Temperature and Mortality: A Review of the Epidemiologic EvidenceEpidemiologic Reviews, 2002
- Effects of extremely hot days on people older than 65 years in Seville (Spain) from 1986 to 1997International Journal of Biometeorology, 2002
- Impact of hot temperatures on death in London: a time series approachJournal of Epidemiology and Community Health, 2002
- The Time Course of Weather-Related DeathsEpidemiology, 2001
- Air pollution and daily mortality in Rome, Italy.Occupational and Environmental Medicine, 1998
- Gaining more flexibility in Cox proportional hazards regression models with cubic spline functionsComputer Methods and Programs in Biomedicine, 1997
- Heat-Related Deaths during the July 1995 Heat Wave in ChicagoNew England Journal of Medicine, 1996
- The Case-Crossover Design: A Method for Studying Transient Effects on the Risk of Acute EventsAmerican Journal of Epidemiology, 1991
- Some effects of the urban structure on heat mortalityEnvironmental Research, 1972