An early stage of hyperthermia can be "heat exhaustion" (or "heat prostration" or "heat stress"), whose symptoms include heavy sweating, rapid breathing and a fast, weak pulse. If the condition progresses to heat stroke, then hot, dry, skin is typical as blood vessels dilate in an attempt to increase heat loss. The decrease in blood pressure can then cause blood vessels to contract reflexly, resulting in a pale or bluish skin colour in advanced cases. Young children, in particular, may have seizures. Eventually, organ failure, unconsciousness and death will result.