Journal
ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH
Volume 71, Issue 4, Pages 199-207Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/19338244.2015.1058235
Keywords
Dairy cows; heat wave; heat stress; kriging; Southern Ontario
Funding
- Ontario Veterinary College (Guelph, Ontario, Canada)
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Climate change has increased the occurrence of heat waves, causing heat stress among humans and livestock, with potentially fatal consequences. Heat stress maps provide information about related health risks and insight for control strategies. Weather data were collected throughout Southern Ontario, and the heat stress index (HSI) was estimated for 2010-2012. Geostatistical kriging was applied to map heat stress, heat waves, and control periods. Average HSI for each period ranged from 55 to 78 during control periods, and from 65 to 84 during heat waves, surpassing levels where morbidity is known to increase substantially. Heat stress followed a temporally consistent geographic pattern. HSI maps indicate high-risk areas for heat-related illness and indicate areas where agriculture and human health may be at increased risk in future.
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