https://shilfa.com/france/la-grave-rd-1091-cut-off-by-mud-landslides-cleansing-the-road/ (In English; there’s a longer link in French here- https://www.ledauphine.com/hautes-alpes/2019/07/25/la-rd-1-091-coupee-apres-une-coulee-de-boue-dans-le-secteur-de-la-commune-de-la-grave
Had we descended from the Col du Lauteret about 20 minutes later than we did, we would have been stuck up there overnight, possibly longer, as a massive landslide swept over the only road down the mountain. There were actually two landslides, with a number of cyclists stuck in-between and apparently airlifted out by helicopter.
That was the day we hit epic rain. I mean really epic, so epic it was very difficult to see where you were going, and brakes were ineffective enough you really didn’t have to worry about skidding.
We had no idea this had happened until a fellow cyclist on Strava asked if we’d heard about it. Nobody was injured, thank goodness!