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When the UK struggles through a heatwave, temperatures over there can get as high as
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the mid-30s.
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For someone like me, who deals with this weather for winter, that doesn't sound like much.
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So do the Brits just need to “toughen up”?
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I mean, we've got roads melting here in our summers.
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We're all used to different climates, yes, but there's more to it than that.
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For starters, a heatwave is relative - basically, it's different depending on where you are.
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The World Meteorological Organisation loosely defines it as “more than 5 consecutive days
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of temperatures exceeding the average max by 5 degrees celsius”.
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So in the UK, it averages about 20C over the summer months, whereas in Australia it averages
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about 30C.
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This means it doesn't take as high a temperature to trigger a heatwave in the UK.
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If we look at other cities, in Toronto their summers are about 25C.
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A heatwave there is three consecutive days over 32C.
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And in India, with temperatures around 35C, they wouldn't call a heatwave unless the
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air temperature reached at least 40C in plains regions.
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So in Australia, and other countries with a high summer temperatures, the buildings
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are built to keep as cool as possible.
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The concept is nothing new.
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It's called vernacular architecture, where buildings are designed based on local needs,
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materials and traditions.
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Take a look at this house.
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This is a Queenslander, found in, well, Queensland.
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They're built out of timber and on stumps — the space underneath the house helps cool
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the building through ventilation.
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There's always a wide veranda for shading and protection from heavy rains, and a corrugated
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iron roof which is lightweight and durable.
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And there's plenty more examples of this style of building for your environment from
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around the world.
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This is a house from the Asir province of Saudi Arabia, where the temperature is moderate
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but it rains often.
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The protruding slates cascade rain away from the clay walls.
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In the Philippines, bahay kubo huts are built with bamboo, with sufficient ventilation for
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the hot summer, and raised above the ground to protect against torrential flooding.
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The igloos of the inuits, rondavels in Africa, and gers in Mongolia — you get the idea.
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And along with this, there's plenty of other architectural choices made to respond to the environment.
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Our public spaces include plenty of shaded areas and sufficient ventilation.
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Not to mention, the majority of the population, about 85%, lives within 50km of the coastline,
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where all the major cities have developed.
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Meaning even in summer, we'd get a nice seabreeze to help cool down the hot air temperature.
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But over on the other side of the world, it's not that easy.
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Did you notice something he didn't mention?
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Air-conditioning is not really a thing in the UK.
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Offices and shopping centres are more likely to have them, but it's not a given
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the way it'd be in Australia and other countries in hotter climates.
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It's just not needed.
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That's because — like how Australian houses are built to keep cool — in the UK and other
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colder climates, everything is designed to keep the heat in.
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There aren't many overhanging eaves or awnings, or shaded outdoor areas, and most windows
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are double-glazed so that the temperature inside buildings stays as warm as possible
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during cold winters.
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Public transport is another big one — the Tube is notorious for its lack of ventilation,
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which means the heat generated from the trains can't escape the underground system very easily.
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This is fine for an English summer most of the time, but as soon as the mercury starts
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rising, it becomes a bit unbearable.
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Rest assured, air con is coming to the Central Line … but in 2030.
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So only a few years to go then.
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This is all well and good for part of the year, but on the flipside, when it gets cold
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in Australia, you really feel it.
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Yes, even if you're from a place where sub-zero temperatures is normal.
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Because the houses are designed to perform well in summer, buildings don't really retain
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much heat.
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Even though the winter months aren't as cold, with averages of about 5 degrees,
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most houses aren't properly insulated.
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The large eaves that give you welcome shade in the summer, stops that same sunshine from
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entering in the winter.
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And of course, the British homes which heat up during summer stay nice and warm during
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the cold winter months.
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So the actual infrastructure of a city can help the temperature feel hotter or cooler
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than it is, but depending on how long we've lived in a certain city, our physiology can
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also affect the way we react to certain temperatures.
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It's called acclimatisation, and it's our body's long-term response to extreme temperatures.
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So it's not just about sweating when it's hot — it's how our bodies decide when
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we sweat, how much we sweat, our tendency to sweat, and even the amount of salt in our sweat.
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It only takes about 2 weeks for a healthy body to acclimatise, depending on different factors.
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And it's faster to adapt to heat than to cold.
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If you're used to a certain range of temperatures, anything outside of that range would feel
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uncomfortable to you.
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So both acclimatisation and our city's infrastructure affects the way we feel temperature.
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So while we might think we're good at dealing with certain extremes, we might be proven
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otherwise.
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So next time you see this or this, maybe don't be too quick to judge.
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I've put some links below to some sites which will help you build or improve your
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home to be more environmentally sustainable and energy efficient.
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And on the topic of interesting architecture,
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I wanted to leave you all with this weird story I found while researching -
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this is a car which was melted due to the concave windows of this building in London.