Summer heat will stick around across large parts of France on Sunday, except for some local cool spots. Forecasters expect the polar jet stream to wave overhead. After that shift, temperatures could become noticeably cooler, with the arrival time for cooler air varying by location.

Regional forecasts still point to ongoing warmth in parts of the south. Some areas will hold on to the warmth, while others may see the cooler air arrive sooner. The local outcome hinges on the area.