(21 Jun 2024)
WORLD EXTREME HEAT IMPACT ON HEALTH
SOURCE: ASSOCIATED PRESS
RESTRICTION SUMMARY:
LENGTH: 5.02
ASSOCIATED PRESS
Veracruz, Mexico - 15 June 2024
1. Various of sun seen through palm tree in extreme heat
ASSOCIATED PRESS
Veracruz, Mexico - 16 June 2024
2. 82-year-old woman trying to cool down at her home in downtown Veracruz
3. Close of fan at her home
4. Various of woman wiping sweat and sitting on bed
5. Women talking by fan
6. Various of people walking across hot square
7. Various of trader selling fruit juices
ASSOCIATED PRESS
College Station, Texas - 7 June 2024
8. Various of squirrels collapsed on the ground in heat
ASSOCIATED PRESS
ARCHIVE: London, UK - 21 July 2023
9. Various of Professor Lewis Halsey wired to body sensors including internal sensor in the colon running inside a special heat tank at 50 degrees Celsius and 25% humidity
10. Various of researchers in the heat tank creating heat stress conditions
11. SOUNDBITE (English) Lewis Halsey, Professor of Physiology, Roehampton University
“Internal systems in terms of heart rate increases and there are there are subtle changes to the way that the heart beats each cycle as well. Ventilation rates, or how fast we breathe that increases as well. You get flushing of blood to the periphery of the body, so more of our blood is being sent to the surface of our skin. It's why some people can look red when it's hot. Now that blood going to the surface of the skin loses heat through the skin to the external environment unless it gets super hot and that helps the body keep cool. So there's a gamut of physiological changes that are happening in the body behind the scenes in response to a high temperature.”
12. Various of temperature panel on outside of heat tank showing researchers are in 51 degrees Celsius
13. Various of researchers being fitted with heat sensors before going into the heat tank to feed back body information
14. Researchers entering heat tank
15. Halsey and core body sensor in heat tank
16. SOUNDBITE (English) Lewis Halsey, Professor of Physiology, Roehampton University
“Yes, humidity can be a big problem for the body. If the ambient temperature is high enough and if the humidity, if the amount of water vapour in the air is high enough because the main way that our body loses heat or stops increasing temperature in a hot environment is by sweating. Human beings are incredibly good sweaters, we’re some of the best sweaters in the animal kingdom as it happens, and the way sweat works is that we have water basically exudes the extremities of the body, and that then evaporates into the surrounding environment. But if there's too much water in the air already, the water, the sweat has got nowhere to go and it just runs off of our body to the floor. It doesn't have much of an effect in that case in terms of losing heat.”
17. Close of monitor showing Halsey's inner body temperature has reached 38 Celsius
18. Halsey running inside tank and sweating profusely but not cooling because the heat tank is so humid
19. SOUNDBITE (English) Lewis Halsey, Professor of Physiology, Roehampton University
“If it goes above 40 degrees, then we're entering a risk zone. Some people will be fine and some people won't. But this is where problems start to happen. So the organs of the body can start to fail or at least start to work less optimally. The reasons for this can be what's called protein denaturation. So proteins sort of start, their shape changes and some of them start to pull apart. You get the very early signs of cooking effectively.”
ASSOCIATED PRESS
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