Hospitals in Europe are gearing up for the next heat wave armed with lessons from this one

French hospitals are moving quickly to upgrade cooling systems after a brutal heat wave exposed how vulnerable older buildings and emergency workflows remain when temperatures spike.

At Paris-Saclay Hospital, staff improvised by sourcing ice from a fast-food restaurant and a supermarket so patients could be cooled in cold-water baths, according to an Associated Press report published July 1. Hospital director Cédric Lussiez said the team thought it was ready, but quickly discovered it was not.

The hospital has now ordered its own ice machine for future heat events. It is also planning cool rooms on each floor and other renovation work, including moving a department for elderly patients, as managers look for ways to avoid another scramble when temperatures rise.

A heat wave that stretched hospitals

The Paris-Saclay episode was only the clearest example of a wider system under pressure. Le Monde reported on June 26 that French hospitals were already at a tipping point after seven days of heatwave strain, with the country’s ORSAN emergency plan escalated to level 3.

That response brought real operational changes. Hospitals postponed non-urgent surgeries, redeployed staff and absorbed a surge in patients suffering from hyperthermia, cardiac and respiratory failures and dehydration. Some facilities said bed availability was extremely limited as emergency departments filled up.

The strain was not isolated to a single facility or a single city. Paris emergency services were also under pressure, and public-health officials were trying to reduce demand on already stretched crews. The Guardian reported on June 26 that Paris authorities banned takeaway alcohol in public during the heat wave as part of that effort.

Old buildings, modern heat

The deeper problem is structural. Le Monde reported on June 28 that France’s Health Ministry estimates 40% of hospitals have been renovated since 2003, but many hospital floors still are not air-conditioned and much of the infrastructure dates to the 1960s or 1970s.

That gap matters because hospital buildings were designed for a different climate. The result is a mix of aging rooms, uneven cooling and emergency improvisation when temperatures climb faster than facilities can adapt.

For hospital leaders, the lesson is not just that a heat wave can create more admissions. It is that the hospital itself can become part of the crisis, especially when staff have to improvise basic cooling logistics for vulnerable patients.

What France is doing next

France has now moved from improvisation to spending. The AP reported that Prime Minister Sébastien Lecornu has announced a €100 million investment to improve hospital cooling infrastructure and that 30,000 air-conditioning units will be distributed to health-care facilities.

The pledge signals that the government sees heat resilience as a health-system issue, not just a weather problem. But it also leaves open major questions about timing, distribution and which hospitals will get upgrades first.

Those unanswered details matter because the next heat wave may arrive before the rebuilding is complete. Hospitals that were forced to improvise this month will need permanent fixes fast if they are to avoid repeating the same failures.

For now, the immediate lesson from Paris-Saclay is blunt: hospitals are no longer waiting to learn from a future disaster. They are building for the next one now.