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The researchers warned that "
heat" will be experienced for longer periods of
. This will affect many more people than
thought. The over-60s are at
because of three physical factors — they sweat less, their hearts have to work
, and their blood
expand more slowly. These things limit the body's
functions. A director at the charity Age UK found the
alarming. She said: "There's now no denying that extreme heat poses a very real health
to our older population." Elderly people in low-
countries are at the highest risk.