When the temperature climbs to 45°C, your body enters survival mode. Sweating, increased heart rate, fatigue, headaches, and irritability are not random summer discomforts. They are biological alarms. Most people think heat becomes dangerous only when someone collapses outdoors. But doctors warn that damage often starts much earlier and builds slowly over consecutive days. Your body loses water, salt, sleep, and energy faster than it can recover. After three straight days of extreme heat, even healthy adults can begin experiencing symptoms that affect the brain, heart, kidneys, and nervous system. The frightening part is that many people mistake these signs for normal tiredness.
