Is the heatwave slowing down your brain?
Research finds that cognitive functions decline as temperatures rise
Hot weather really does fry our brains, a new study has confirmed.
Researchers at Harvard University found that people who were exposed to hotter temperatures “did significantly less well” in cognitive and memory retention tests than people in air-conditioned environments.
The research, published in the journal Plos Medicine, focused on 44 students at a Boston university. Half of the subjects had been assigned to dorm accommodation with air conditioning, while the other half lived in halls without it.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
“They were followed before, during and after a five-day heatwave, when the indoor temperatures exceeded 26C without air conditioning,” The Times reports.
“The students performed two cognition tests, measuring processing speed and working memory - and when the temperature rose, the scores of those in the hotter accommodation dropped by about 13% compared with their air-conditioned peers,” the newspaper continues.
Memo Cedeno, from Harvard Chan School of Public Health, said the research shows that “even strong and healthy people” suffer impaired intelligence in the heat. “We see news pieces on heatwaves and mortality in older people, but the rest of us feel immune,” he noted.
The reality, that all types of people are affected mentally, “could be because of loss of bodily fluids”, Cedeno added, or because the brain is working harder maintaining critical functions such as thermoregulation.
The researchers have “recommended the roll-out of sustainable air conditioning systems wherever possible”, reports The Independent.
However, Professor Max Headley, a physiologist at the University of Bristol, suggests that the study has made “a mountain out of a molehill”. Scientists were already aware of the mental impact of tiredness and thirst, which are the likely factors at play in the Harvard research, he argues.
“To my mind, the observations can be readily explained by simple physiological factors that are entirely predictable. I can’t see that it’s anything to get excited about,” Headley said.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
Why Bhutan hopes tourists will put a smile back on its face
Under The Radar The 'kingdom of happiness' is facing economic problems and unprecedented emigration
By Chas Newkey-Burden, The Week UK Published
-
7 beautiful towns to visit in Switzerland during the holidays
The Week Recommends Find bliss in these charming Swiss locales that blend the traditional with the modern
By Catherine Garcia, The Week US Published
-
The Week contest: Werewolf bill
Puzzles and Quizzes
By The Week US Published
-
Hundreds of children hit with heat exhaustion at World Scout Jamboree in South Korea
Speed Read One British parent said children ‘think they are going to die’
By Chas Newkey-Burden Published
-
Home Office worker accused of spiking mistress’s drink with abortion drug
Speed Read Darren Burke had failed to convince his girlfriend to terminate pregnancy
By The Week Staff Published
-
In hock to Moscow: exploring Germany’s woeful energy policy
Speed Read Don’t expect Berlin to wean itself off Russian gas any time soon
By The Week Staff Published
-
Were Covid restrictions dropped too soon?
Speed Read ‘Living with Covid’ is already proving problematic – just look at the travel chaos this week
By The Week Staff Last updated
-
Inclusive Britain: a new strategy for tackling racism in the UK
Speed Read Government has revealed action plan setting out 74 steps that ministers will take
By The Week Staff Published
-
Does life really flash before our eyes when we die?
feature Researchers have found that some brain waves change pattern even after blood stops flowing to the brain
By The Week Staff Published
-
Sandy Hook families vs. Remington: a small victory over the gunmakers
Speed Read Last week the families settled a lawsuit for $73m against the manufacturer
By The Week Staff Published
-
Farmers vs. walkers: the battle over ‘Britain’s green and pleasant land’
Speed Read Updated Countryside Code tells farmers: ‘be nice, say hello, share the space’
By The Week Staff Published