France's Summer Heatwaves Could Trim 0.1 Points Off 2026 GDP Growth

France's Finance Ministry has issued a preliminary estimate suggesting that this summer's successive heatwaves could shave 0.1 percentage points off the country's economic growth for 2026. The ministry was quick to clarify that the figure is an early assessment rather than a formal revision of its official forecast, which currently projects growth at 0.7% for the year.

The warning comes on the heels of a downgrade by the INSEE statistics agency, which revised second-quarter growth for 2026 down to 0.0% from an initial reading of 0.2%. This followed a contraction of 0.2% in the first quarter, placing the euro zone's second-largest economy in a precarious position.

Finance Minister Roland Lescure has linked the weak data directly to the summer's extreme weather, describing the INSEE downgrade as "the first impact of the horrible summer that we had." According to INSEE, meeting the government's full-year target of 0.7% would now require growth of 0.5% in both the third and fourth quarters — a scenario that appears increasingly difficult to achieve.

Lescure indicated that the ministry would incorporate expectations of a weak third quarter when it updates its growth and deficit forecasts in September, ahead of presenting the 2027 budget bill in early October.

The summer's impact was most acutely felt in the Bordeaux region, which experienced one of the most severe heatwaves, while a major wildfire also struck the Fontainebleau forest near Paris in July, adding to the economic and environmental strain.