There were severe storms in south west France at the beginning of the week with sadly some people drowned in their cars. This article
www.france24.com
has details and some photos including this one of a TGV on track with the embankment and ballast completely washed away. Possibly there was a speed limit in force due to the weather as I can't imagine the train staying on the rails if it was travelling at any speed. Several hundred passengers were evacuated by bus.

‘Violent, vicious’ thunderstorms sweep southeastern France, three dead
At least three people died, including a couple in their eighties, whose vehicle was swept away by floodwaters after severe thunderstorms hit southeast France on Tuesday. Heavy rain a day earlier forced…

