Tax breaks and fast-tracked permits for controversial shale gas exploration are likely to form part of the multi-billion pound infrastructure package aimed at kick-starting sluggish economic growth. British reserves of the energy source are much higher than previously thought.
Treasury Chief Secretary Danny Alexander will also reveal details of projects such as new road and rail capacity, science facilities and nuclear power stations, in a Commons statement.
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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.