Stifling temperatures reaching 38° Celsius that have kept most of France sizzling over the past week, with extreme heat arriving from North Africa and Spain, are due to begin falling on Sunday.
Burgundy and Beaujolais regions notably face partial evaporation of annual production as unusually high temperatures are shrinking grapes.
Five major Paris parks remained open on Thursday night and Friday night as hot spell looks set to last into next week.
France's national weather service put 47 areas on Orange alert and government implemented health measures as hot spell looks set to last.
Temperatures are expected to exceed 40 degrees Celsius as France swelters under hottest late June- early July heatwave for 60 years.