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How a coat of paint is tackling extreme heat in an Indian slum

How a coat of paint is tackling extreme heat in an Indian slum

Yahoo10-03-2025

STORY: For the residents of this informal settlement in India's Gujarat, tackling extreme heat could be as simple as a lick of paint.
White paint to be exact, containing highly reflective pigments such as titanium dioxide.
Over the past two months, hundreds of roofs have been given a new coat in a bid to keep people cool as the hottest time of the year approaches.
:: THIS EARTH
With climate change making India's summers more extreme, residents here - in Ahmedabad - have suffered temperatures over 115 degrees Fahrenheit in recent years.
The painting initiative is part of a global scientific trial to study how indoor heat impacts people's health and economic outcomes in developing countries - and how the "cool roofs" might help.
'They are very highly reflective and they also emit and radiate the heat away..."
Epidemiologist Aditi Bunker is leading the project.
"Half of the community are assigned a cool roof, and half are not, and then we want to track a whole range of outcomes including health, and indoor environment outcomes, and we want to know what the effect of reducing the indoor temperature is on these outcomes.'
Most of the homes in Ahmedabad's crowded Vanzara Vas slum are airless, one-room dwellings.
Resident Suman Pravin Vanzara said that before talking part in the study, the heat indoors was unbearable.
"Now that the color has been applied, the house stays cooler. Earlier we could not even sit on the floor, now we can. If the fan is not turned on at night, it's still fine."
The Ahmedabad trial will run for one year.
Other study sites are in Burkina Faso, Mexico and the island of Niue in the South Pacific.
Early results from Burkina Faso show that the cool roofs did reduce indoor temperatures and that that subsequently lowered residents' heart rates.

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Avoid new shoes and look after your mental health. How to be well at the Hajj
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Avoid new shoes and look after your mental health. How to be well at the Hajj
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The body's resting core temperature is typically about 37 degrees Celsius (98.6 degrees Fahrenheit), just 4 degrees Celsius (7 degrees Fahrenheit) away from catastrophe in the form of heatstroke. The bigger killer in the heat is the strain on the heart, especially for people who have cardiovascular disease. Blood rushes to the skin to help shed core heat, causing blood pressure to drop. The heart responds by trying to pump more blood to keep someone from passing out. Avoid going out during the day unless necessary. Seek shade and rest often, despite the temptation to go at top speed. The Hajj is a marathon not a sprint. White or pale-colored clothing and UV umbrellas reflect the sunlight, meaning your body and clothing won't get as hot. Oral rehydration sachets can help replenish electrolytes lost through sweating and physical exertion. There are also hands-free 'Hajj' umbrellas that are worn on the head, allowing pilgrims to pray and carry out their rituals unencumbered. Put your best foot forward with comfy shoes Avoid new shoes, says Dr. Hina Shahid, the London-based chair of the Muslim Doctors Association. 'If you have new shoes, break them in beforehand. Make sure your footwear is comfortable. You don't want to get blisters.' Well-fitting sandals or sliders are fine for Mecca, which has well-paved roads and sidewalks. It is common to see Muslims streaming into the city by foot. There is smooth tiling on the outer courtyard of the Grand Mosque that is washed by an army of cleaners at regular intervals. But pilgrims go barefoot when circling the Kaaba, where the marble flooring is cool to the skin whatever the weather. But the terrain changes in Muzdalifah, where people collect pebbles to use in the symbolic stoning of pillars representing the devil. 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