10 Things Heat Does to Your Body While You Sleep During a Heatwave

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How extreme nighttime heat disrupts your body's natural cooling process and secretly impacts your health while you sleep.

Your Body Struggles to Cool Itself

You Wake Up More Often

You Lose More Water Than You Realize

Your Heart Works Harder

Your Breathing Can Feel More Difficult

Night Sweats Become More Common

Your Brain Doesn't Recover Properly

Your Kidneys Work Harder

Your Body May Not Recover After Exercise

Your Risk of Heat Exhaustion Can Continue Overnight

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Europe and the UK have experienced record-breaking temperatures, leaving millions struggling through unusually hot nights. While most people know that heat makes it harder to fall asleep, fewer realize what happens inside the body after they finally drift off.

Your body depends on a slight drop in core temperature to enter deep, restorative sleep. When your bedroom stays too warm, that natural cooling process is disrupted, placing extra stress on multiple body systems throughout the night.

Health experts warn that prolonged exposure to hot nights can affect everything from hydration to cardiovascular health. 

Here are 10 surprising ways extreme nighttime heat affects your body while you sleep.

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