I’m Hot: Quick Ways to Prevent Overheating

I’m Hot: Quick Ways to Prevent Overheating

Written by Dr Andrew Stein, Consultant Nephrologist (UHCW Coventry). Last updated: June 2026

Feeling uncomfortably hot drains your energy fast. When your body struggles to dump excess heat, taking immediate, practical steps to cool down is vital for your comfort and safety.

As as nephrologist, it is important to prevent dehydration and the Acute Kidney Injury (AKI) it can lead to. In very hot periods like now, we see more cases of AKI. Many are preventable. Here is how.

1. How the Body Manages Heat

Your brain’s hypothalamus maintains a stable core temperature around 37°C using two main mechanisms:

• Vasodilation: Blood vessels widen, pushing blood to the skin’s surface to radiate heat away.

• Sweating: Sweat glands release moisture, which cools the skin as it evaporates.

In high humidity, sweat cannot evaporate efficiently, requiring external cooling methods.

2. Immediate Steps to Cool Down Fast

If you are overheating right now, lower your temperature quickly with these targeted actions:

• Target pulse points: Apply ice packs or damp cloths to your wrists, neck, temples, and armpits where blood vessels run closest to the skin.

• Take a lukewarm shower: Avoid freezing water, which constricts blood vessels and traps core heat. Lukewarm water keeps vessels dilated to let heat escape.

• Use a fan and mist: Spray your skin with water while sitting before a fan to artificially accelerate evaporative cooling.

3. Hydration and Diet Adjustments

Staying hydrated keeps your natural cooling system running. Dehydration directly halts sweat production.

• Drink strategically: Sip water consistently before you feel thirsty. Monitor urine color; aim for a pale, straw-like yellow.

• Limit diuretics: Alcohol and caffeine increase fluid loss, worsening dehydration.

• Eat light, hydrating foods: Heavy meals require significant metabolic energy to digest, raising core temperature. Opt for water-rich foods like cucumbers, watermelon, and salads.

4. Optimising Your Environment and Clothing

Modifying your wardrobe and living space reduces the external heat burden on your body.

• Choose natural fibres: Wear loose, light-coloured garments made of 100% cotton or linen. Synthetic fabrics trap heat and moisture.

• Manage windows and airflow: Keep windows and blinds closed during peak midday heat. Open them at night to create cross-breezes.

• Position fans smartly: Point a box fan outward in a window at night to draw hot air out of the room.

5. Recognising Signs of Heat Illness

It is crucial to know when being uncomfortably hot turns into a medical issue.

Heat Exhaustion vs. Heatstroke

• Heat Exhaustion: Characterized by heavy sweating, dizziness, headache, nausea, and a rapid pulse. Move to a cool place and sip water immediately.

• Heatstroke: A life-threatening emergency indicated by confusion, vomiting, or a lack of sweating despite extreme heat. Seek immediate emergency medical assistance.