Has it been a dry or wet year or somewhere in between?
Provence is a big area
Best for you to check with newspapers and other media. Here's a source
https://www.thelocal.fr/
and an article from today
https://www.thelocal.fr/20170727/wildfires-french-locals-help-evacuated-holidaymakers
and another
https://www.theguardian.com/world/2017/jul/27/fires-in-southern-france-under-control-say-emergency-workers
Most of the resort areas have been hard hit by immense forest fires.
So, it depends on where you are going.
Otherwise, check a live stream for the cities you intend to visit and study the 14-day forecast.
Then, re-pack as necessary.
What you will need are a good pair of broken-in walking shoes, though.