Despite intense rainfall, Spain’s total reservoir capacity increased by just one per cent

Image of rain falling on an umbrella.

Image of rain falling on an umbrella. Credit: Perfect Strangers/

THE rain that fell in Spain for several days last week has increased the total capacity of the country’s reservoirs by just over one per cent.

As indicated by the weekly data published this Tuesday, October 24, by the Ministry for the Ecological Transition, in the last seven days, another 577 cubic hectometres (hm³) have been added.

This equates to a rise of 1.03 per cent. The increase leaves Spain’s water supplies standing at 35.59 per cent of its total capacity, with 19,945 hm³ stored.

According to the Ministry, the rain that fell in the last week ‘considerably’ affected the entire mainland. The largest amount of water collected was in Vigo, where 233.7 litres/m² were recorded.

This week’s slight increase brings to an end 19 consecutive weeks of falling capacities. The figure had not risen since the week of June 13, when it climbed by a fraction of 0.1 per cent, following another nine previous weeks of decline.

On average, in the last 10 years, the reservoirs were at 47.9 per cent of their capacity with 26,853 hm³, much higher than today’s total.

How does today’s situation compare to that of 2022?

However, the situation is better than that of 2022, when the figures were even worse. In this same week, the water reserves stood at 17,826 hm³, the equivalent of 31.81 per cent capacity. Today, the reservoirs are 3.8 points above that level.

There are varying situations when the individual reservoirs are analysed. The water supply on Galicia Costa has gone from 53.4 to 62.1 per cent in these last seven days.

Some of the reservoirs that were in a more critical state last week have also increased. The Guadiana reservoir went from 23.5 to 24.3 per cent, while the Guadalquivir rose from 17.9 to 18.4 per cent.

Sadly, there are also some that continue to drop, despite almost a week of rain. For example, for example, the internal catchments of Catalonia fell from 20.7 per cent to 19.9 per cent.

The Andalucian Mediterranean reservoir system dropped from 22.5 to 22.2 per cent, with the Segura going from 22.9 to 22.3 per cent.

Which reservoirs have the highest capacity in Spain?

Among the rest of the water catchment areas, the Eastern Cantabrian continues to be the one with the best data in all of Spain. It stands at 75.3 per cent of its capacity, followed by the Western Cantabrian, at 71.2 per cent. In the middle part are the Tagus, at 47.6 per cent, and the Ebro, at 34.7 per cent.

On the other hand, the one with the worst situation in the entire country continues to be the Guadalete-Barbate system. Despite the rain, it has remained unchanged since last week, at 15.1 per cent capacity.

As a whole, the reservoirs of Andalucia – the region most affected by the current drought conditions – managed to rise slightly above 20 per cent this week after registering their worst records of the year last week.

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Written by

Chris King

Originally from Wales, Chris spent years on the Costa del Sol before moving to the Algarve where he is a web reporter for The Euro Weekly News covering international and Spanish national news. Got a news story you want to share? Then get in touch at