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POLITIKOFF

Politiko 2026-07-16 22:30:06

High temperatures at night are increasingly affecting the quality and duration of people's sleep. According to an analysis published by the American organization Climate Central, climate change is costing each person an average of about 56 hours of sleep per year.

The study, which analyzed data from over 1,300 cities around the world for the period 2020–2025, shows that hotter nights are making it harder to fall asleep and stay asleep. The annual loss of 56 hours translates to about seven full nights of sleep.

According to the report, the problem has worsened significantly compared to previous decades. In most of the areas studied, sleep loss related to high temperatures has at least doubled since the 1970s.

The worst-hit regions are the Middle East and Southeast Asia, where residents lose an average of 55 to 91 hours of sleep per year.

Southern Europe is also feeling the effects of this phenomenon. In Naples, residents lose about 51 hours of sleep per year, in Athens 45 hours, while in Valencia 42 hours.

Experts warn that the consequences are not limited to daily fatigue. Chronic sleep deprivation is linked to mood disorders, difficulty concentrating, decreased productivity, and an increased risk of cardiovascular problems and a weakened immune system.

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