Heat Cramps 2 : Extremely high temperatures can cause muscular pains and spasms called heat cramps. Heat cramps don't usually require emergency medical attention but is an early sign that the body is having difficulty with heat.
City of Chicago, Emergency Management & Communications (Alert Chicago - Emergency Preparedness), Glossary of Emergency Preparedness Terms, City Hall Chicago, Illinois, USA 2015. http://www.cityofchicago.org/city/en/depts/oem/sup p_info/alertrespond/glossary.html, (Emr Prep - Amer) {870}