As the UK is currently experiencing another intense heatwave, many are questioning why the high temperatures feel particularly unbearable compared to other parts of the world.
Despite facing the same scorching sun and global warming trends, the heat in the UK seems to have a unique impact, leading some to wonder if there are other factors at play beyond just the temperature on the thermometer.
With temperatures reaching around 30°C, the British heatwave seems extreme when compared to climate change-induced wildfires in the US and Europe.
Before dismissing this as a common British complaint, it’s important to acknowledge that scientific evidence proves the severity of the heatwave in the UK.
“Heatwaves are subjective events, with different countries interpreting them based on people’s average expectations,” explained climate expert Professor Hannah Croke in an interview with BBC Science Focus.
Professor Croke emphasized that factors like humidity, wind speed, and temperature all play a role in how a heatwave is experienced and perceived by individuals.
Something is floating in the air
The UK’s island geography means that it is surrounded by water, which leads many to assume it would help cool down the country. However, the presence of cold water can actually have the opposite effect.
Meteorologists like Dr. Matthew Patterson explain that the UK’s climate, influenced by moist marine air, affects how heat is lost from the body through radiation, conduction, convection, and evaporation.
Evaporation plays a key role in cooling the body, but high moisture levels in the air can decrease its effectiveness. Wind speed also impacts evaporation, with strong winds aiding in cooling the body.
Indices like Feels Like Temperature and the Universal Temperature Index (UTCI) are used to predict how temperature, humidity, and wind speed will affect individuals during a heatwave.
UK homes not fit for purpose
The design of UK homes, coupled with the lack of standard air conditioning, poses a challenge during heatwaves. The majority of UK homes are not equipped to deal with extreme heat due to their design and age.
Historically, UK homes were built to allow sunlight in, which can lead to higher indoor temperatures. In contrast, European and American homes often have external shutters to block out heat.
As temperatures continue to rise due to climate change, the design and construction of UK homes will need to adapt to better cope with heatwaves. Lack of understanding on how to keep homes cool during hot weather exacerbates the issue.
About our experts
Hannah Croke OBE is a British hydrologist and Professor of Hydrology at the University of Reading. She has received numerous awards for her work in flood forecasting and risk management.
Matt Patterson is a Postdoctoral Research Fellow at the University of Reading, with interests in atmospheric dynamics, seasonal prediction, and climate change.
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Source: www.sciencefocus.com
