Six southern English counties become the first placed in 'severe drought' under the post-2012 classification
England has declared its first 'severe drought' under the post-2012 classification, covering parts of six southern counties. Roughly 30 million people across England and Wales are covered by hosepipe bans.
The Scientist · Science desk
Bar chart of reservoir levels in % of capacity: expected average, roughly 75%; actual average, just over 50%; Ardingly Reservoir in West Sussex, 23%; Wimbleball Reservoir in Somerset, 21%.
% of reservoir capacity filled In % of capacity
| Item | Value | Claim |
|---|---|---|
| Expected average, roughly | 75% of capacity | 18 |
| Actual average, just over | 50% of capacity | 18 |
| Ardingly, West Sussex | 23% of capacity | 7 |
| Wimbleball, Somerset | 21% of capacity | 7 |
What happened
- The Environment Agency says south-east and south-west England have had their driest April to September in more than a century.
- In July the UK Centre for Ecology & Hydrology put most of England's monitored river flows in one of three categories: "below normal", "notably low" or "exceptionally low".
- So far 11 UK water companies have announced hosepipe bans in 2026, ten across central, southern and eastern England and one in Wales.
- Under a temporary use ban, hosepipes cannot be used to water gardens, wash vehicles and windows, or fill pools.
Why it matters
- What it limits constraint Businesses that withdraw water from natural sources in the affected counties face extra checks, and monitoring of reservoir levels, river flows and water quality is stepped up.
- Who's exposed exposure Groundwater, which south-east England relies on more than reservoirs, can take years to respond fully to current conditions, so recovery there may lag any return of rain.
- What it sets up precedent First use of the label is not a severity record: the government says droughts in 1976 and 1995 would have met it had the category existed.
According to the BBC, low reservoir levels are a key reason parts of southern England entered severe drought [13]. On average England's reservoirs are just over half full, where the Environment Agency would expect about three-quarters at this time of year [6]. That is a shortfall of about 25 percentage points [18]. An average hides the tail. Ardingly Reservoir in West Sussex stands at 23% and Wimbleball Reservoir in Somerset at 21%, both rated "exceptionally low" [7].
Storage is one input among several. The BBC names three main sources of water: reservoirs, rivers and deep underground [16]. Welsh Water says most reservoir levels in Wales are normal for the time of year [11], yet all of Wales was already in drought, as was most of England, after the hottest summers on record in both nations [9]. Wales shows that reservoir levels alone do not track drought status one for one.
Severe drought is also the top rung of a ladder. Below drought sits "prolonged dry weather", the category that covers parts of north-east and north-west England [17].
The two headline numbers count different things. Severe drought applies to parts of Cornwall, Devon, Dorset, Somerset, East Sussex and West Sussex [1]. The hosepipe-ban figure covers people in parts of England and Wales [3]. The thing this doesn't tell you is how many of those people live inside the six counties, and the BBC account does not give that split.
What to watch
- Whether the extra checks on businesses that withdraw water produce published findings or new limits in the six counties.
- Reservoir readings at Ardingly and Wimbleball against the roughly three-quarters level the Environment Agency would expect.
- Whether more water companies join the 11 that have announced hosepipe bans so far this year.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence72
- Adoption70
- Hype gap−5
- Incentives
- Insufficient
- Confidence65
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
'Severe drought', the highest category, has been declared for parts of Cornwall, Devon, Dorset, Somerset, East Sussex and West Sussex.
- [2]
The 'severe drought' classification was introduced following the 2012 drought, and this is the first time it has been implemented.
- [3]
Roughly 30 million people across parts of England and Wales are covered by hosepipe bans, as part of water companies' efforts to manage supplies.
- [4]
Under the severe drought declaration, environmental authorities will ramp up monitoring of reservoir levels, river flows and water quality, and carry out extra checks on businesses withdrawing water from natural sources.
- [5]
The UK government says two previous events would have met the 'severe drought' classification had it been in place: August 1976 (Devon and Yorkshire in England, and Gwent, Monmouthshire and Glamorgan in Wales) and November 1995 (Yorkshire only).
- [6]
At this time of year the Environment Agency says it would expect England's reservoirs to be about three-quarters full, but they are just over half full on average.
- [7]
Ardingly Reservoir in West Sussex and Wimbleball Reservoir in Somerset are among those at 'exceptionally low' levels, at 23% and 21% respectively.
- [8]
The Environment Agency says south-east and south-west England have experienced their driest April to September in more than a century.
- [9]
Most of England and all of Wales were already under drought conditions, after both nations' hottest summers on record.
- [10]
So far 11 UK water companies have announced hosepipe bans in 2026; ten are spread across central, southern and eastern parts of England and one is in Wales.
- [11]
Dwr Cymru Welsh Water says most reservoir levels in Wales are normal for the time of year.
- [12]
South-east England relies more heavily on groundwater than reservoirs; groundwater levels are generally declining, and water can flow more slowly through some rock types than others, sometimes taking years to fully respond to current conditions.
- [13]
A key reason why parts of southern England have entered 'severe drought' is low reservoir levels.
- [14]
Most monitored river flows in England were classed as 'below normal', 'notably low' or 'exceptionally low' in July.
- [15]
Hosepipe bans, officially called 'temporary use bans', mean hosepipes cannot be used for watering gardens, washing vehicles and windows, and filling pools.
- [16]
The three main sources of water are reservoirs, rivers and deep underground.
- [17]
Parts of north-east and north-west England are in the category below drought, called 'prolonged dry weather'.
- [18]
The average reservoir shortfall is about 25 percentage points of capacity: roughly 75% expected minus just over 50% actual.
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Sources
2 independent publishers whose own reporting we read for this story.
- bbc.co.ukSevere drought declared and hosepipe bans in force - is your area affected?
1 article · October 15, 2026
- theguardian.comSevere drought declared in six areas of England as public water supplies under threat
1 article · October 15, 2026
Topics and entities
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Entities
- Environment AgencyFollow
- UK Centre for Ecology & HydrologyFollow
- Welsh WaterFollow
- UK Met OfficeFollow
- British Geological SurveyFollow