They have had to wait for it this year – but sun lovers are finally enjoying sizzling temperatures.
Following a washout July and August, the September heatwave is expected to reach its zenith on Saturday, when temperatures could hit 33C in London, according to forecasters.
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Named after the Greek letter omega because of its shape, this system occurs when an area of high pressure gets stuck between two areas of low-pressure to the west and east and also slightly south.
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This has brought torrential rain and flooding for Spain and Greece but hot, dry and clear conditions for the UK and central Europe.
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