A new exceptional heat wave is sweeping across Europe but also in USA. In Europe, The main cause is the blockade at Omega that squeezes out of Portugal: two low pressure centers located in the Atlantic Ocean, off the Iberian Peninsula and the other in southeastern Europe, are drawing very warm air from the Sahara desert.
Spain, France, Italy and the UK could reach temperatures never seen before in their respective countries. One of the main problems concerns the quality of sleep, but it is a problem that occurs not only in the EU, but a little all over the world, as also seen by the high temperatures that have invested and are also affecting the USA.
The study: Rising temperatures erode human sleep globally, on One Eart, about this issue explained: "Ambient temperatures are rising worldwide, with the greatest increases recorded at night. Concurrently, the prevalence of insufficient sleep is rising in many populations.
Yet it remains unclear whether warmer-than-average temperatures causally impact objective measures of sleep globally. The temperature effect on sleep loss is substantially larger for residents from lower-income countries and older adults, and females are affected more than males.
Those in hotter regions experience comparably more sleep loss per degree of warming, suggesting limited adaptation. By 2099, suboptimal temperatures may erode 50–58 h of sleep per person-year, with climate change producing geographic inequalities that scale with future emissions.
The largest of these studies pooled data in the United States from nationally representative health surveys and found that higher monthly nighttime temperature anomalies increased self-reported nights of insufficient sleep during the previous month.
However, retrospective self-reported sleep outcomes are notoriously imprecise, unreliable, and have been shown to have questionable internal validity. An advance of the present study is that our dataset allows us to control for all stable individual characteristics and leverage within-person fluctuations in both weather exposures and sleep outcomes to isolate the plausibly causal effect of nighttime temperature on our person-level sleep outcomes while controlling for other potentially confounding individual-level, calendar-date-specific, and subnational administrative region-by-month spatiotemporal factors that might otherwise bias inference between temperature exposures and sleep outcomes.
The results of our binned temperature regressions indicate that exogenous increases in nighttime ambient temperature reduce adult sleep duration across nearly the entire observed temperature distribution. Climate change is projected to continue to increase the magnitude and frequency of extreme nighttime temperatures beyond the recent historical record."