A seriously hot summer between now and 2017 could claim more than 6,000 lives, the Department of Health report warns. But it also stresses that milder winters mean deaths during this time of year - which far outstrip heat-related mortality - will continue to decline.
The report is to help health services prepare for climate change effects. A panel of scientific experts commissioned by the Department of Health and Health Protection Agency (HPA) has looked at the way the UK has responded to rising temperatures since the 1970s, and how the risks are likely to change. While summers in the UK became warmer in the period 1971 - 2003, there was no change in heat-related deaths, but annual cold-related mortality fell by 3% as winters became milder - so overall fewer people died as a result of extreme temperatures.
Rather than physiological changes explaining our ability to adapt to rising temperatures, the report puts this down primarily to lifestyle alterations - our readiness to wear more informal clothes, for instance, and the shift away from manual labour.
It is also a mixed picture when it comes to the health impact of air pollution. As a result of regulations, levels of several key pollutants are likely to decline over the next 50 years, but the concentration of ozone may well increase. This is associated with breathing difficulties, particularly for asthmatics and those with existing lung problems, and could lead to 1,500 extra hospital admissions and deaths every year. Skin cancer meanwhile is also likely to increase, although there are studies which suggest greater exposure to sunlight may prevent other forms of cancer.
Other areas which had caused concern may transpire not to be as worrying as initially thought. A reappraisal of the evidence suggests malaria outbreaks are likely to remain rare, although health authorities need to be alert to outbreaks in continental Europe which could affect travellers, the report says.
However, while vector-borne diseases may not be the problem once thought, food-borne ones remain an issue: improved food hygiene will be necessary to prevent a 14.5% increase in food poisoning by bacteria such as Salmonella, which is affected by rising temperature.
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Posted on 14th February 2008
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