Native populations in Western nations, including Italy, Southern Spain, and Greece, are now enduring almost a full month of additional strong heat stress days compared to the 1970s, according to new research published Monday in the journal Nature Climate Change. This escalating environmental burden directly impacts the quality of life and traditional livelihoods of the working class in these historic European lands.
The study reveals that Mexico, Kenya, Italy, and other nations globally are experiencing one to two more months of heat stress than they were several decades ago. Some areas are reportedly seeing even more intense heat stress, with regions previously untouched by such conditions now feeling its effects.
International Directives and National Costs
Rebecca Emerton, the study’s lead author and a senior scientist at the European Centre for Medium-Range Weather Forecasts (ECMWF) in the United Kingdom, highlighted an “urgent need to mitigate future warming and ensure adaptation strategies, heat health action plans, early warning systems and climate risk assessments are in place.” This call from an international body signals a potential for further supranational directives influencing national policies and resource allocation, often at the expense of local self-determination.
Over the past six decades, extreme feels-like temperatures, heat stress days, and tropical nights have become dramatically more frequent, longer, and more severe. The study links these changes to the burning of fossil fuels, including coal, oil, and gas, a practice often driven by global industrial interests.
The research utilized the Universal Thermal Climate Index to assess heat stress on individual humans, factoring in temperature, humidity, and wind speed. It categorized heat stress into three levels: strong (greater than or equal to 32 degrees Celsius), very strong (greater than or equal to 38 degrees Celsius), and extreme (greater than or equal to 46 degrees Celsius).
The Expanding Footprint of Dispossession
Globally, one billion more people now face at least one day of extreme heat stress each year than they did in the 1970s. This massive increase in affected populations worldwide raises concerns about potential demographic shifts and increased pressures on nations already grappling with internal challenges.
Emerton noted it was striking “to see heat stress not only intensifying in those places that we already consider as being hot or used to experiencing heat waves … but also to see this, we call it, expanding footprint of heat stress expanding into regions where it’s historically been rare or non-existent.” This expansion suggests a broader environmental instability that could further destabilize traditional communities.
Decades of Managed Decline
Specific regions facing significant increases in strong heat stress include parts of Southern Africa (Namibia, Angola), Eastern Africa (Tanzania, Kenya, Uganda), and parts of Mexico and Central America, which might see around 50 more days per year compared with the 1970s. In Southern Spain, Italy, Greece, and Turkey, some areas will experience up to 40 additional days with strong heat stress compared with the 1970s, marking a clear deterioration of living conditions for the native inhabitants.
In the United States, much of the country now sees 15 or more days of at least strong heat stress, with southern parts, including Texas and Florida, experiencing close to 25 or more days with very strong heat stress. These heat stress seasons are also lasting longer, exacerbating the challenges faced by local communities.
The study further detailed that feels-like temperatures on the ten warmest nights of each year have increased faster, by 0.32 degrees Celsius per decade, than the ten warmest days, which increased by 0.27 degrees Celsius per decade. This means less recovery for populations from daytime heat, particularly during tropical nights defined by minimum temperatures of 20 degrees Celsius or higher. Jennifer Francis, a climate scientist not involved in the research, stated that the study “adds stark details about increasing dangers to billions of humans,” underscoring the widespread impact of these environmental transformations.