Mauritius Water Crisis: Mare-aux-Vacoas Drops to 33% Capacity

Mauritius is facing a deepening water crisis, with the Mare-aux-Vacoas reservoir, the country's largest, dropping to only 33% of its full capacity as of Thursday 12 November 2026. Authorities have described the situation as remaining critical, with no immediate relief in sight.

Mare-aux-Vacoas, located in the central highlands of Mauritius, is the backbone of the island's water supply network. It serves a large portion of the population, particularly residents in the central plateau and the western regions of the island. When its levels fall sharply, the knock-on effects are felt across homes, businesses and agriculture in those areas.

The drop to 33% is a significant warning sign. Water supply to the centre and west of Mauritius is already described as being under pressure, meaning residents in areas such as Quatre Bornes, Vacoas, Phoenix and surrounding communities may face reduced or interrupted water access in the coming days and weeks.

The situation is being closely monitored by the Central Water Authority, the government body responsible for water production and distribution across Mauritius. However, with no major rainfall forecast in the short term, and the island heading deeper into what is already shaping up to be a dry and hot summer season, restoring reservoir levels will depend heavily on weather patterns in the weeks ahead.

The crisis comes against a wider backdrop of climate-related stress on the island. El Nino conditions have already been flagged as a threat to Mauritius this summer, with forecasters warning of higher-than-normal temperatures and below-average rainfall. That combination is particularly damaging for reservoir replenishment, which relies on consistent rainfall over the central highlands.

What this means for residents: If you live in the central or western parts of Mauritius, you should prepare for the possibility of water rationing or scheduled cuts in supply. Storing water where possible, reducing household consumption and reporting leaks promptly to the Central Water Authority are all practical steps. Businesses that depend on a consistent water supply, including hotels, restaurants and manufacturers, may also need to review their contingency plans.

The broader question is how Mauritius will manage increasing water stress as climate variability becomes more severe. Investment in desalination, rainwater harvesting and leak reduction across the aging distribution network has been debated for years, but progress has been slow. A reservoir at 33% in mid-November, before the peak of summer, is a sharp reminder of how vulnerable the island's water infrastructure remains.

Source: Le Defi Media