 Always get medical help if those symptoms get worse. And when we get to heat stroke, it's a deadly condition and requires immediate help. The symptoms at this time are a high body temperature, no sweat, fast and strong pulse, and nausea, confusion, and almost the risk of passing out. And if that happens, if the person is really serious, if you see that the person is having a really bad time with the heat, call 911 right away.