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Review
. 2016 Sep;124(9):1334-43.
doi: 10.1289/ehp.1409277. Epub 2016 Apr 15.

Critical Review of Health Impacts of Wildfire Smoke Exposure

Colleen E Reid  1 , Michael Brauer, Fay H Johnston, Michael Jerrett, John R Balmes, Catherine T Elliott
Affiliations
Review

Critical Review of Health Impacts of Wildfire Smoke Exposure

Colleen E Reid et al. Environ Health Perspect. 2016 Sep.

Abstract

Background: Wildfire activity is predicted to increase in many parts of the world due to changes in temperature and precipitation patterns from global climate change. Wildfire smoke contains numerous hazardous air pollutants and many studies have documented population health effects from this exposure.

Objectives: We aimed to assess the evidence of health effects from exposure to wildfire smoke and to identify susceptible populations.

Methods: We reviewed the scientific literature for studies of wildfire smoke exposure on mortality and on respiratory, cardiovascular, mental, and perinatal health. Within those reviewed papers deemed to have minimal risk of bias, we assessed the coherence and consistency of findings.

Discussion: Consistent evidence documents associations between wildfire smoke exposure and general respiratory health effects, specifically exacerbations of asthma and chronic obstructive pulmonary disease. Growing evidence suggests associations with increased risk of respiratory infections and all-cause mortality. Evidence for cardiovascular effects is mixed, but a few recent studies have reported associations for specific cardiovascular end points. Insufficient research exists to identify specific population subgroups that are more susceptible to wildfire smoke exposure.

Conclusions: Consistent evidence from a large number of studies indicates that wildfire smoke exposure is associated with respiratory morbidity with growing evidence supporting an association with all-cause mortality. More research is needed to clarify which causes of mortality may be associated with wildfire smoke, whether cardiovascular outcomes are associated with wildfire smoke, and if certain populations are more susceptible.

Citation: Reid CE, Brauer M, Johnston FH, Jerrett M, Balmes JR, Elliott CT. 2016. Critical review of health impacts of wildfire smoke exposure. Environ Health Perspect 124:1334-1343; http://dx.doi.org/10.1289/ehp.1409277.

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Conflict of interest statement

The views expressed in this article are solely those of the authors and the U.S. EPA does not endorse any products or commercial services mentioned in this article. The authors declare they have no actual or potential competing financial interests.

Figures

Figure 1
Figure 1
Review of studies flow chart.
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