Fig. 1From: Impacts of extreme heat on emergency medical service calls in King County, Washington, 2007–2012: relative risk and time series analyses of basic and advanced life supportRelative risks (95 % CIs) of BLSa and ALSb calls for patient-type categories, by age groupc. a95th percentile (29.7 °C humidex). b99th percentile (36.7 °C humidex). cSolid points are significantly greater than 1 (p <0.05). dWhile statistically significant, the estimate is based on a small number of cases: 1,136 cases on non-heat days, 17 cases on a heat dayBack to article page