French agriculture faces growing risk from recent heatwaves, with temperatures around 40°C threatening vegetable crops, including onions. Reports say the extreme weather could reduce yields and lead farmers to lose thousands of tonnes of produce. One concern highlighted is the potential for significant year-on-year impact in some sectors, with estimates suggesting portions of annual tonnage could be wiped out. The issue centers on how sustained high temperatures affect growth and crop health, which can lower output and increase the likelihood of supply shortfalls later in the season. While the reports focus on expected losses and shortage fears, they do not detail specific measures being taken or confirm final production figures. Overall, the coverage indicates that heatwaves are already damaging parts of the crop and that the scale of disruption may vary by crop type and region. The concern is that reduced volumes could tighten supplies and contribute to shortages, particularly for onions and other vegetables.