You can be the best disciplined pilot, behave yourself, don't take any chances, and still be thrown to the ground by a dust devil. So I hate dust devils and would very much prefer not to land until later on in the afternoon, when the ground has cooled off a bit. I set it a couple of years ago flying across Israel, from Zichron on the coast, into the Golan Heights. But then I run into sustained continuous sink, and reluctantly have to get on the speed bar, which only makes the sink worse. Again I am getting low.
Dust devils are dangerous, but they do mark the creation of a new thermal.
I find one behind me, turn around and head back towards it. I arrive above the column of dust, and sure enough there is lift. I am saved. Makes sense after so long in the air. I know that in a couple off minutes I will have also broken my record of 76.5 km, even if the GPS is switched off.