Skip to main content
Journal cover image

A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke.

Publication ,  Journal Article
Liu, JC; Pereira, G; Uhl, SA; Bravo, MA; Bell, ML
Published in: Environmental research
January 2015

Climate change is likely to increase the threat of wildfires, and little is known about how wildfires affect health in exposed communities. A better understanding of the impacts of the resulting air pollution has important public health implications for the present day and the future.We performed a systematic search to identify peer-reviewed scientific studies published since 1986 regarding impacts of wildfire smoke on health in exposed communities. We reviewed and synthesized the state of science of this issue including methods to estimate exposure, and identified limitations in current research.We identified 61 epidemiological studies linking wildfire and human health in communities. The U.S. and Australia were the most frequently studied countries (18 studies on the U.S., 15 on Australia). Geographic scales ranged from a single small city (population about 55,000) to the entire globe. Most studies focused on areas close to fire events. Exposure was most commonly assessed with stationary air pollutant monitors (35 of 61 studies). Other methods included using satellite remote sensing and measurements from air samples collected during fires. Most studies compared risk of health outcomes between 1) periods with no fire events and periods during or after fire events, or 2) regions affected by wildfire smoke and unaffected regions. Daily pollution levels during or after wildfire in most studies exceeded U.S. EPA regulations. Levels of PM10, the most frequently studied pollutant, were 1.2 to 10 times higher due to wildfire smoke compared to non-fire periods and/or locations. Respiratory disease was the most frequently studied health condition, and had the most consistent results. Over 90% of these 45 studies reported that wildfire smoke was significantly associated with risk of respiratory morbidity.Exposure measurement is a key challenge in current literature on wildfire and human health. A limitation is the difficulty of estimating pollution specific to wildfires. New methods are needed to separate air pollution levels of wildfires from those from ambient sources, such as transportation. The majority of studies found that wildfire smoke was associated with increased risk of respiratory and cardiovascular diseases. Children, the elderly and those with underlying chronic diseases appear to be susceptible. More studies on mortality and cardiovascular morbidity are needed. Further exploration with new methods could help ascertain the public health impacts of wildfires under climate change and guide mitigation policies.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Environmental research

DOI

EISSN

1096-0953

ISSN

0013-9351

Publication Date

January 2015

Volume

136

Start / End Page

120 / 132

Related Subject Headings

  • United States
  • Toxicology
  • Smoke
  • Humans
  • Fires
  • Environmental Exposure
  • Australia
  • 41 Environmental sciences
  • 34 Chemical sciences
  • 31 Biological sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Liu, J. C., Pereira, G., Uhl, S. A., Bravo, M. A., & Bell, M. L. (2015). A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke. Environmental Research, 136, 120–132. https://doi.org/10.1016/j.envres.2014.10.015
Liu, Jia C., Gavin Pereira, Sarah A. Uhl, Mercedes A. Bravo, and Michelle L. Bell. “A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke.Environmental Research 136 (January 2015): 120–32. https://doi.org/10.1016/j.envres.2014.10.015.
Liu JC, Pereira G, Uhl SA, Bravo MA, Bell ML. A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke. Environmental research. 2015 Jan;136:120–32.
Liu, Jia C., et al. “A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke.Environmental Research, vol. 136, Jan. 2015, pp. 120–32. Epmc, doi:10.1016/j.envres.2014.10.015.
Liu JC, Pereira G, Uhl SA, Bravo MA, Bell ML. A systematic review of the physical health impacts from non-occupational exposure to wildfire smoke. Environmental research. 2015 Jan;136:120–132.
Journal cover image

Published In

Environmental research

DOI

EISSN

1096-0953

ISSN

0013-9351

Publication Date

January 2015

Volume

136

Start / End Page

120 / 132

Related Subject Headings

  • United States
  • Toxicology
  • Smoke
  • Humans
  • Fires
  • Environmental Exposure
  • Australia
  • 41 Environmental sciences
  • 34 Chemical sciences
  • 31 Biological sciences