The authority has issued an orange warning – the second highest – in the capital.
"There is a significant risk of severe thunderstorms with intense precipitation, hail, and gusty winds", writes Météo-France.
In large parts of the country, it is expected to become very hot. In the central and southern parts of the country, the temperature may exceed 40 degrees.
The orange warning applies to, in addition to Paris, a further 56 departments.
"The high temperatures will gradually move northwards. Temperatures of 35 to 36 degrees will be reached or exceeded in large parts of the country", states Météo-France.
The Olympic Village in Paris, where around 10,000 athletes reside, was built without air conditioning for environmental reasons, but at the beginning of July, an additional 2,500 air conditioning units were ordered as a precautionary measure.
Meteorologist Matthieu Sorel at Météo-France tells BFMTV that heatwaves are becoming more frequent.
Heatwaves are a clear indication of climate change, they are becoming more frequent, more intense, starting earlier, and lasting longer, says Sorel.
