The Met Office forecast a shift to cooler, more unsettled weather after a heatwave. Some places could receive intense showers, while others may get little rain. Water running quickly from hard, very dry ground can add to local flood risk when rainfall is particularly heavy.
That does not mean the drought is ending. At the start of August, Environment Agency figures showed that seven areas of England were in drought. Reservoir storage across England had fallen to 69%, which was 11.6 percentage points below the long-term average for that time of year. Five monitored reservoirs were classed as exceptionally low.
The dry conditions were also affecting rivers, wildlife and farming. The agency reported low flows, algal blooms, fish deaths and restrictions on water abstraction. More than 25 million people were covered by temporary limits on water use in early August.
Water supply problems continued in south-east England. South East Water said thousands of customers in parts of Kent lost supplies before most connections were restored. The company asked customers to limit use while storage tanks recovered.
Wessex Water also announced a temporary-use ban covering about 1.4 million customers in parts of south-west England. It was the company's first such restriction since 1976. Thames Water, which had already imposed restrictions, asked customers to keep reducing demand.
Brief downpours can reduce immediate pressure on vegetation and lower wildfire risk, but drought recovery normally requires sustained rainfall. Rivers, reservoirs and groundwater respond over different timescales, so several wet days in one area cannot restore depleted water resources across England.
Flooding and drought can therefore occur at the same time in different places, or even in the same region. A short, intense storm can overwhelm drains and produce rapid runoff while longer-term river flows, groundwater and reservoirs remain unusually low.
Source: theguardian.com