The cause of fierce political clashes between Marine Le Pen and Jean-Luc Mélenchon was the heat wave in France.

It should be noted that France has recently been facing one of the most intense heat waves in recent years.

The leader of the French far-right and the neo-communist leader of La France Insoumise (LFI) are at odds over whether the solution lies in the mass installation of air conditioners or in different measures to adapt to climate change.

As temperatures exceed 40 degrees Celsius in many parts of France, the debate over how to address the increasingly frequent heat waves is becoming one of the key political issues ahead of the 2027 presidential election.

Behind the controversy over air conditioners lies a broader debate over the strategy France should adopt in response to the climate crisis: on the one hand, the immediate protection of citizens from extreme weather events, and on the other, the need to avoid adopting solutions that could place an even greater burden on the environment.

Le Pen’s plan for widespread use of air conditioners

Marine Le Pen argues that recurring heat waves make a different approach necessary. Her party, the “National Rally” (RN), proposes a program for the widespread installation of air conditioners, prioritizing schools, hospitals, nursing homes, and public services—that is, places where children, the elderly, and other vulnerable groups are present.

According to RN officials, cooling buildings should be treated as essential infrastructure, just like heating in the winter. Le Pen’s party is even considering providing financial incentives for the installation of air conditioners in homes and businesses, in the form of subsidized loans.

According to RN officials, cooling buildings should be treated as essential infrastructure, just like heating in the winter. Le Pen’s party is, in fact, considering offering financial incentives for the installation of air conditioning in homes and businesses, in the form of subsidized loans.

Mélenchon’s Position

Jean-Luc Mélenchon continues to strongly criticize the widespread installation of air conditioners. As he recently stated, “Installing air conditioning everywhere is exactly what we shouldn’t be doing,” arguing that air conditioning systems discharge heat into the outdoor environment, contributing to rising temperatures in cities and increased energy consumption.

At the same time, he has argued that the real solution to heat waves is energy retrofitting of buildings, thermal insulation, shading, natural ventilation, and the creation of more green spaces, thereby reducing the need for mechanical cooling.

The Shift of the Left

However, the stance of the French Left has changed significantly compared to previous years. Although it continues to believe that the priority should be tackling climate change rather than simply adapting to its consequences, it now recognizes that in certain cases the use of air conditioners is necessary.

Thus, the updated plan by “Unbowed France” to combat heat waves calls for the use of fans, shading systems, and solar films as the first choices, while the installation of air conditioners is recommended where deemed absolutely necessary, primarily in hospitals, nursing homes, and schools that house vulnerable populations.

Left-wing officials acknowledge that reality has changed. As they note, a few years ago there was hope that global warming could be curbed more effectively. Today, however, they believe that adapting to the now inevitable consequences of climate change is an equally necessary priority.

The climate crisis at the heart of the election campaign

The clash with Le Pen – Mélenchon over air conditioning is in fact part of a broader debate on how France should prepare for the climate crisis. For years, the focus has been primarily on reducing greenhouse gas emissions. Today, however, increasingly frequent and intense heat waves are forcing all political forces to also address adaptation to these new conditions.

The government of Sébastien Lecornu is already facing intense criticism for the way it is handling the current heat wave, while polls show that more than half of the French believe their country is not adequately prepared for such extreme weather events.

With the 2027 presidential election approaching, experts estimate that the climate crisis will be one of the dominant issues of the campaign. And the debate between Le Pen and Mélenchon over air conditioning is not just about how to deal with this year’s heat wave, but reflects two different approaches to how France should live in a world that is getting hotter and hotter.