Scorching temperatures triggered by climate change could render holiday destinations too hot to handle.
Scientists plotting predicted temperature rises across the world over the coming decades have found that holiday hot spots loved by Brits may soon become too warm and stifling to safely visit.
Due to carbon dioxide emissions being pumped into the atmosphere by human beings, global temperatures are currently rising at rates unprecedented for thousands of years.
Already the world has warmed up by 1C since 1880 and, without massive reductions in human-made emissions, it will comfortably reach 2C by 2050.
While a 2C swing doesn't sound too much when considered on a day-to-day basis, averaged out across the world - with some areas baring far more of the brunt than others - it will completely transform the Earth.
Many cities which were once favoured getaways for Brits will become intolerable.
Much as in parts of central India today, the blazing summer's sun will render most of the day out of action for all but sitting in the shade or by an air conditioning unit.
By 2050 places like Madrid will become inhospitable for all but the most factor-50-lathered-Brit capable of withstanding serious heats.
A study by the Crowther Lab which looked at 250 cities across the world predicted that the Spanish capital's average temperature in July would rise by 6.4C - edging its mean daytime temperature close to 40C.
New York city will have a climate closer to that of Birmingham, Alabama, with an average daytime temperature in July of around 28C on average, and far higher on peak days.
If the Big Apple does not switch to clean forms of energy production and transport quickly, then its air will become hot and heavy, clogged with particulate pollution, causing eyes to water and persistent coughs.
The study predicts that London's climate will be closer to that of present day Barcelona.
While this might sound like a welcome development, the temperature rise will prove deadly for some vulnerable and elderly people.
Ilan Kelman, a professor of disasters and health at University College London, warned that the sort of weather seen in southern England last August makes being outdoors difficult and dangerous.
“These temperatures are unfortunately in line with the expectations for heat under climate change, which is one of the most concerning health impacts,” he said.
“Without stopping human-caused climate change, these levels of summer heat and humidity will become regular, making it highly dangerous for us to be outdoors and even indoors without continual cooling.
"Air pollution can also worsen under heat with its knock-on health effects, such as for cancer and asthma."
Other parts of Europe will have average temperatures closer to that of present day India and Australia.
July in Marseille will be 5.2C hotter on average - rendering it closer to 2021 Algiers - while Athen's 5.7C rise matches it with Fez.
The Crowther Lab predicts that 22% of the world's cities will encounter climate conditions which don't currently exist anyone on the globe.
European cities will generally resemble areas 1,000km to the south of them today, meaning the hottest parts of the continent will be sizzling in the summer in 29 years' time.
Green grass will be replaced by parched brush, the earth will become dusty and cracked, and beaches on the Mediterranean coast good for little but sheltering beneath a parasol.
A 4.7C average temperature rise in the winter means many European areas will lose all their snow, spelling an end to skiing seasons and frosty festive getaways.
The tropics - a band stretching along the equator which includes countries such as Brazil, Indonesia and most of central Africa - will become much drier and drought stricken in the summer, and much wetter and prone to extreme weather events in the winter.
All of this is without factoring in global sea level rises.
Large stretches of Indonesia, Thailand and low-level USA - such as Miami, Boston and New York - previously safe from swells will be struck by devastating annual floods.
As much as climate change can feel overwhelming and hopeless, you can play a part in finding a solution.
Friends of the Earth has some great ideas for positive changes you could make.
