Although the firefighters brought the fire under control in the meantime, the danger of a new outbreak is great, they said.
BFMTV reported that several fire-fighting planes were used. The fire brigade was able to protect five houses in one village that were threatened by the flames.
During the heatwave, many residents in Paris have to deal with a strike by rubbish collectors. In 10 city districts, the bins have remained unemptied since Monday and hundreds of tons of rubbish have piled up on the pavements.