Puffin island on cusp of closure as it runs out of water

Why is Lundy island at risk of closing or being evacuated?

Lundy faces closure because its water system is running dangerously low. The island depends on rainfall, reservoirs, and groundwater from boreholes. It has had no significant rainfall since April and received less than 20% of the usual 1.5 metres expected by this point. Water restrictions are already in place.

Reservoir levels reached only 13% before emergency action began. Water was shipped from north Devon, while pond water was pumped to a treatment works. These measures helped raise reservoir levels to 23.7%, but pond supplies are also falling. The seasonal ferry carrying water is due to stop later this month.

The consequences could be severe. Lundy might need to cancel holidays, close businesses, and evacuate its 28 residents and farm animals. Rain is forecast, but meteorologists say it could take weeks to refill groundwater and reservoirs. Islanders are therefore still relying on emergency supplies and hoping for sustained rainfall.

What is a borehole, and how does Lundy use boreholes for water?

A borehole is a narrow, deep hole drilled into the ground to reach underground water. Water stored in cracks and spaces beneath the surface can then be pumped up for treatment and use. Boreholes are especially valuable where a community has no connection to a mainland water network.

Lundy is entirely self-sufficient. Its system combines collected rainwater with water drawn from boreholes drilled into the island’s granite. This groundwater helps supply reservoirs and taps when rainfall is limited. However, boreholes cannot guarantee unlimited water, because groundwater levels depend on rainfall filtering down through the ground.

The current drought has made that dependence clear. Lundy received less than 20% of its typical rainfall by this point in the year, while reservoirs dropped sharply. Rain now needs to recharge the underground water system as well as refill reservoirs. Meteorologists said that process could take weeks, even after rain returns.

How much water does Lundy normally receive, how much rain has it received recently, and how much water do its residents use each day?

Lundy normally expects about 1.5 metres, or 4.92 feet, of rainfall by this point in the year. That rainfall supports its reservoirs and helps recharge groundwater beneath the island. Rain is therefore not just weather there; it is the main source feeding the entire water system.

Recently, the island received less than 20% of that typical total. The prolonged dry period pushed reservoir levels down to 13% at their lowest. Water use continued at about 9,000 to 11,000 litres each day for residents, visitors, the pub, and the working farm. Even small daily shortages quickly become serious when no mains supply exists.

Emergency shipments began in August. The first delivery carried about 67,000 litres, followed by 4,000 litres three times a week. Pond water has also been treated. These supplies helped reservoirs reach 23.7%, but they are temporary and cannot replace normal rainfall indefinitely.

Why does a remote island like Lundy depend so heavily on rainfall, reservoirs, and groundwater?

A remote island cannot easily connect to a large mainland water system. Lundy therefore has to produce and store its own supply. Rainfall fills reservoirs and seeps into the ground, replenishing groundwater that can later be pumped from boreholes. This makes local weather central to daily life.

The island’s granite landscape and limited infrastructure add difficulty. Water must be stored for dry periods, then moved around using a small fleet of vehicles and pumps. A landslip also closed part of the track, forcing crews to transfer water through tanks and fire hoses around the damaged section.

This dependence becomes dangerous during prolonged drought. Lundy had no significant rainfall since April and its reservoirs fell to 13%. Mainland deliveries helped, but the ferry is seasonal and expensive. More irregular rainfall linked to a changing climate could require larger storage, better efficiency, or more reliable emergency connections.

What happens to the island's people, animals, farms, businesses, and visitors if its water supplies run out?

Water shortages would affect every part of Lundy’s community. The island needs water for residents, visitors, toilets, accommodation, the pub, and its working farm. Without enough supply, normal life and tourism could not continue safely.

The article describes the possible chain of events clearly. People might have to leave, while farm animals would need evacuation because they require water every day. Businesses could close or reduce services. Holidays would be cancelled, and visitors would lose access to the island. Even before that point, the pub closed toilets, removed bath plugs, and directed visitors to alternative facilities.

Lundy has never evacuated its people and animals or cancelled all holidays because of water shortages. Management says it is now close to making that decision. Emergency pond treatment and ferry deliveries have delayed the risk, but falling pond levels and the end of seasonal shipments make continued rain essential.

What alternatives can Lundy use to obtain or conserve water besides its normal reservoirs and boreholes?

Lundy’s alternatives fall into two groups: bringing in extra water and reducing demand. Mainland shipments provide an emergency supply, while local ponds offer another source that can be treated. These options are costly or limited, so conservation is equally important.

The island began transporting water on the passenger ferry MS Oldenberg in August. Its first delivery contained about 67,000 litres and cost around £7,000. Later deliveries carried 4,000 litres three times weekly. As a last resort, pond water used by wildlife is pumped to a treatment works. Residents also capture shower water for flushing toilets.

Other restrictions include removing bath plugs, closing the pub toilets, and using facilities supplied from pond water. These measures have helped reservoirs rise from 13% to 23.7%. However, pond levels are dropping, the ferry service is seasonal, and daily demand remains high. The alternatives can delay closure but cannot replace rain indefinitely.

How do droughts, groundwater recharge, reservoirs, and changing rainfall patterns determine whether a community has secure water supplies?

Drought reduces incoming water over a long period. Reservoirs then lose water through use and evaporation, while less water soaks into the ground. Groundwater recharge is the slow process of rainfall filtering downward to refill underground stores. Communities need both surface storage and groundwater to survive dry spells.

Lundy shows how these parts connect. Rain normally fills reservoirs and feeds groundwater used by boreholes. After months with little rain, reservoir levels fell to 13%, and borehole and reservoir recovery became slow. Even when rain is forecast, the article says it could take weeks to refill groundwater and reservoirs. Daily demand continues during that wait.

Changing rainfall patterns make planning harder. Lundy experienced record winter rainfall, followed by an exceptionally hot and dry spring and summer. Future warmer conditions could bring sharper swings between floods and droughts. Secure supplies may therefore require more storage, conservation, alternative sources, and careful monitoring of groundwater and reservoir levels.

Key Facts:

📌 Reservoir levels fell to 13% at their lowest point.

📌 Lundy received less than 20% of expected rainfall.

📌 Closure could mean evacuating people and farm animals.

📌 A borehole is a deep drilled hole used to access groundwater.

📌 Lundy’s boreholes reach water beneath its granite.

📌 Groundwater recharge can take weeks after rain returns.

📌 Lundy normally expects about 1.5 metres of annual rain by this time.