UK households are being told to draw curtains and shut blinds until Wednesday. Met Office heatwave criteria, where a specific threshold must be exceeded for three consecutive days, are likely to be reached by Wednesday, they say.

They say heatwave conditions are likely for much of southern and central England. In addition to high daytime temperatures, warm nights are also likely in southeastern parts of the UK early in the week, with even a chance of a tropical night in a few places, which is where temperatures do not drop below 20°C overnight.

The British Red Cross said: "Even with the windows closed, sun shining through the glass can warm your home up quickly.

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"Make sure to cover windows during the day to prot

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