The International Monetary Fund (IMF) has trimmed its forecast for UK and global economic growth this year and next year.
Britain will only expand by 1% in 2012-13, according to the respected body, 0.1% less than previously predicted.
The forecast for next year has been downgraded from 2.2% to 1.9% since October.
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After the heatwave come the storms, with lightning flashes illuminating the night sky across much of the country last night.
An Independence Day event at a UK base has been cancelled by the US Air Force over security fears.
British firms predict the economy should sustain a "solid" pace of growth for the rest of the year thanks to lower oil prices and inflation.