Fig. 3From: A spatial analysis of heat stress related emergency room visits in rural Southern Ontario during heat wavesHeat stress maps for Southern Ontario during each of the 3 heat waves and 6 control periods. Heat stress is represented on Isopleth maps where darkest colours (red) represent the most intense heat stress levels. Light colours represent the areas of least intense heat stress. Contour lines indicate the level of HSI reported in heat stress units. Each of the 24 hospital locations are marked in blueBack to article page