France facing severe water shortages as heat and drought intensify

France’s heatwave and rainfall deficit are turning into a broader water-stress crisis, with restrictions or water-saving appeals now in place across 78 prefectures, according to reporting published on June 25.

The pressure is arriving as temperatures surge. Le Monde reported that France recorded its hottest day ever and that 72 departments were under red alert on June 25, with 14 more under orange alert.

That combination is tightening the squeeze on agriculture, local water systems, river managers and power production as soils dry out and demand remains high.

Restrictions spread as the heat peaks

Emergency measures are already visible in parts of the country. Le Monde reported that about 15 administrative departments had formal emergency measures in place, including bans on irrigating crops with river water in parts of central France since June 23.

Some prefectures are not yet imposing full restrictions, but are asking residents and businesses to save water as the dry spell spreads.

The Garonne basin is one of the clearest stress points. Officials have been releasing water from dams in the Pyrenees earlier than usual to keep the river from running dry, and a water official said this had not been necessary this early in 33 years of low-water support.

Groundwater remains under pressure

The French Geological and Mining Research Bureau, BRGM, added to the concern in a June 19 bulletin on groundwater.

BRGM said 86% of groundwater levels were declining. It still described the overall national situation as moderately satisfactory, but said 55% of monitoring points were around or above monthly norms.

The bulletin linked the deterioration to a marked rainfall deficit in the second half of May and the first half of June. It also said near-term trends were expected to remain mostly downward if effective rain stays scarce.

That leaves the water system fragile heading into the rest of summer. Even where reserves are not yet at crisis levels, sustained low rainfall can quickly change local conditions once demand rises further.

Rivers, farms and power production

The stress is now affecting river systems and the infrastructure that depends on them. Low flows and high temperatures increase pressure on river ecosystems, and they can also interfere with industrial operations that need cooling water.

EDF said on June 23 that reactor No. 2 at the Golfech nuclear plant was shut down at 23:45 on June 22 because the Garonne was expected to reach 28 C, the limit set by the plant’s 2006 operating order.

EDF said the shutdown was not a nuclear safety issue. Under the operating order, the unit can be modulated or stopped when the downstream daily average river temperature exceeds 28 C.

What officials are watching next

The immediate question is whether more prefectures will tighten restrictions or add irrigation bans if the heat and rainfall deficit continue.

Officials are also watching whether rain arrives soon enough to slow the decline in river levels and groundwater. BRGM’s next update will show whether the current downward trend is stabilizing or spreading more widely.

EDF and the grid operator RTE will be watching for further reactor curtailments if rivers remain too warm or too low for normal operations.

For farmers, the near-term risk is tighter irrigation limits during a critical point in the summer growing season. For municipalities and households, the concern is whether demand keeps rising as reserves fall. For river managers and power producers, the stakes are a longer period of low flows, warm water and operational constraints.