I think isn31c means Rivesaltes (and not Rivaltes).
There have been major wildfires across the entire region for a few days now; villages and campsites have been evacuated, and quite a few homes have been completely burned down. There was still an active one yesterday in Trévillach, a few kilometers from Narbonne, but I don't know any more than that. I'm much further north. I think Elizabeth must be just as hot as it is here.
https://youtu.be/5kIMn4Y7S4E
The wildfire season is just beginning. Everyone planning to visit the south of France this summer and travel in the countryside should check with their accommodations / hotels. It can be very localized, but there are areas completely burned and roads closed.
The SNCF had announced the preventive cancellation of about 30% of trains due to the new heatwave currently hitting the area, which could cause track failures. But no one can predict a new fire outbreak.
I hope isn31c's friend will be able to reach their destination without too many problems. It's around 38°C right now; being stuck inside a train in this heat must be unbearable, even with an SNCF rice salad bowl. :-)
As for the cancellations, most of the July 14th fireworks in the region have been canceled due to the fire risks. The biggest one, in Carcassonne, is still scheduled.