Global warming is leading to shorter sleep durations across the world that could increase health risks especially affecting the elderly, women and people in low-income countries, a recent study has found.

Researchers warn that rising temperatures may lead to growing global disparities in productivity and health if unmitigated climate change continues, according to the worldwide study published in May in the journal One Earth.

With higher nighttime temperatures, individuals are already losing 44 hours of sleep per year on average, representing an additional 11 nights of less than the recommended seven hours of sleep.