Early advice to everyone: no politics. The OP asked if you've had flooding interrupt your riding this year.
On topic, amazingly, as a SoCal resident, I can actually say yes to this one! We had a big, big storm hit the mountains, and the combination of rainfall and snowmelt swelled one of the creeks that's usually a trickle into a proper torrent. That torrent took a hard right turn, and ate about a 50 foot chunk of the road right off-- right at a sharp curve in the road, no less. This part of road happens to be a fairly heavily used route for cyclists (Greenspot Road.) It's also a shortcut for people trying to get to the mountain resorts via Hwy.38, so they actually put the quick work into it, and it was only closed for about 3 weeks.
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