Heatstroke signs and symptoms include:  High body temperature. A core body temperature of 104 F (40 C) or higher, obtained with a rectal thermometer, is the main sign of heatstroke. Altered mental state or behavior. Confusion, agitation, slurred speech, irritability, delirium, seizures and coma can all result from heatstroke. Alteration in sweating. In heatstroke brought on by hot weather, your skin will feel hot and dry to the touch. However, in heatstroke brought on by strenuous exercise, your skin may feel dry or slightly moist. Nausea and vomiting. You may feel sick to your stomach or vomit. Flushed skin. Your skin may turn red as your body temperature increases. Rapid breathing. Your breathing may become rapid and shallow. Racing heart rate. Your pulse may significantly increase because heat stress places a tremendous burden on your heart to help cool your body. Headache. Your head may throb. 
heatstroke signs symptoms include:  high body temperature  core body temperature 104 (40 c) higher  obtained rectal thermometer  sign heatstroke  altered mental state behavior  confusion  agitation  slurred speech  irritability  delirium  seizures coma can result heatstroke  alteration sweating  heatstroke brought hot weather  skin will feel hot dry touch  however  heatstroke brought strenuous exercise  skin may feel dry slightly moist  nausea vomiting  may feel sick stomach vomit  flushed skin  skin may turn red body temperature increases  rapid breathing  breathing may rapid shallow  racing heart rate  pulse may significantly increase heat stress places tremendous burden heart help cool body  headache  head may throb
heat stroke