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A Heat-Health Watch system operates in England and Wales from 1 June to 15 September each year in association with the Department of Health and the Welsh Assembly.
The Heat-Health Watch system comprises four levels of response based upon threshold maximum daytime and minimum night-time temperatures. These thresholds vary by region, but an average threshold temperature is 30 °C by day and 15 °C overnight.
Issued at: Tuesday 28 June 2011 at 08:46
Temperatures are not expected to reach heatwave threshold values until further notice.
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