We recently came across this article about a flash flood event that struck the northern towns of Sonbong and Rason back in August 2015, so we had a look at the imagery. There is quite a lot to see. Luckily, the region is fairly sparsely populated, so there is not a lot of damage to infrastructure. Almost all the rivers in the region have clearly widened dramatically due to the flash flood.
What we found interesting is that many of the rivers seem to have flooded even though they have relatively small catchment areas. Normally, floods are most common for large rivers with large catchment areas, whereas these are mostly just streams a few kilometres long. Also the floods seem to have been confined to a relatively small area around the two towns and a bit further north, as we could not find signs of flooding further inland.
A bridge washed away.
Some houses washed away (we count 6).
To see the above locations and a number of other interesting sights in Google Earth download this KML file.