Mare-Aux-Vacoas Reservoir Falls to 40% Capacity Amid Severe Drought in Mauritius

Author: Mauritius Ranking
Author Bio: Mauritius Ranking covers current affairs, environmental issues, public services and important national developments in Mauritius, providing timely and accessible news coverage.

Published Date: 15 September 2026
Updated Date: 15 September 2026

Mauritius is facing growing pressure on its water resources as the Mare-Aux-Vacoas reservoir, the country’s largest reservoir, has fallen to around 40% of its capacity amid a severe drought situation.

The decline has raised fresh concerns about the country’s water supply, particularly as Mauritius continues to experience significantly below-average rainfall. Earlier in the year, authorities had already warned that the country was facing one of its most serious drought situations in decades.

Mare-Aux-Vacoas Reaches a Critical Level

Mare-Aux-Vacoas plays a major role in supplying water to parts of Mauritius. The reservoir is located in the Plaines Wilhems region and is the largest reservoir on the island.

The latest level of approximately 40% highlights the continuing impact of insufficient rainfall and prolonged dry conditions. Reports earlier in the year showed the reservoir already falling below half of its capacity, with levels around 48% reported in May and approximately 41% by July.

The continued decline has increased pressure on authorities to carefully manage the country’s remaining water reserves.

Mauritius Faces a Severe Drought

The current situation is part of a wider drought crisis affecting Mauritius. Government authorities have previously described the country’s water-resource situation as exceptionally serious and have been working on measures to protect available supplies.

The government has been considering urgent measures to manage declining water resources, including stronger conservation efforts and measures aimed at reducing pressure on the country’s reservoirs.

With rainfall remaining inadequate, the recovery of reservoirs will depend heavily on the arrival of significant rainfall.

Growing Pressure on Water Management

The declining level at Mare-Aux-Vacoas highlights the importance of careful water management across Mauritius.

As one of the island’s principal water sources, the reservoir’s condition can have an impact on households, businesses, agriculture and other activities that depend on reliable water supplies.

The situation also underlines the need for residents and businesses to avoid unnecessary water consumption while authorities continue monitoring reservoir levels.

Conservation Becomes Increasingly Important

With the reservoir approaching a much lower level than normal, water conservation is becoming increasingly important.

Simple measures such as reducing unnecessary consumption, repairing leaking pipes and avoiding excessive use of treated water can help reduce pressure on the national supply system.

At the same time, long-term solutions will require investment in water infrastructure, better management of existing resources and strategies capable of dealing with increasingly unpredictable rainfall patterns.

A Warning for Mauritius

The Mare-Aux-Vacoas situation is more than a short-term water-supply concern. It demonstrates the vulnerability of Mauritius to prolonged periods of low rainfall.

Climate variability, population needs and increasing demand for water make the protection of existing resources increasingly important. The current drought could therefore serve as a warning about the need for stronger long-term water-security planning.

Final Thought

The fall of the Mare-Aux-Vacoas reservoir to around 40% capacity is a serious reminder of the water challenges facing Mauritius. With rainfall remaining insufficient, conservation and responsible water use are essential. The immediate priority is to protect available supplies, while longer-term investment and planning will be necessary to strengthen Mauritius’ water security against future droughts.