Runners are used to toughing it out. A warming climate can make that deadly

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1. “Exertional heatstroke happens during exercise when the body can’t properly cool, rising above 104 degrees (40 Celsius) and triggering a central nervous system problem such as fainting or blacking out. It can be effectively treated by rapidly cooling a victim, but lots of races lack the resources or expertise to do it. And many runners, in a culture that esteems grit and suffering, may ignore conditions that put them at risk.”