When a body temperature reaches 40°C or above this is considered a heat stroke. Due to this there will be behavior changes like slurred speech, irritability, seizures, and agitation.
During heat stroke dehydration can cause electrolyte imbalances that affect normal breathing. The heart works overtime to push blood to the skin's surface in an effort to spread heat, resulting in an elevated pulse rate.
If a person is exposed to extreme hot weather for a longer period of time, it can affect the person’s overall health by causing heat stroke and leads to nausea, vomiting, turning the skin color red, and making that person sick.
During heat stroke dizziness or fainting can be caused by low blood pressure and insufficient blood flow to the brain.
If you suspect someone is experiencing heat stroke, take them to a cool place away from direct sunshine and reduce their body temperature, use cold, moist towels or spritz their skin with water.
If the person is aware and can swallow, offer them cold water to drink. Avoid caffeinated and alcoholic beverages, since they might worsen dehydration.
Heat stroke is a dangerous medical condition that requires immediate care. Call emergency services immediately and maintain cooling measures until help arrives.