kiticat wrote:
Interesting that the trigger threshold teperature is different for
different parts of the country. I note it ranges from 28C for the NW
England to 32C in London. Do higher temps really have less of a health
effect on vulnerable people in London? I realise they are more likely to
encounter higher temps more often but I'm suprised that factor would
make such a big health difference.

I think you do get acclimatised to the temperatures where you live. It's
almost reached 80F here now, which is most definitely uncomfortable for
me (I don't like the heat anyway, never have) but this is presumably
just a typical warm spring day to someone in SE England.
--
Steve Loft, Glenlivet. 200m ASL
Weather and webcam:
http://www.livet.org.uk/weather