Pull that hub off and pop the bearings out. Have a new seal ready for the installation.
Thoroughly wash the bearings out in solvent and dry them. Look at them VERY carefully for pitting or rust. Remember, cleanliness is next to Godliness. Next, run them around in their races while "feeling for complete smoothness".
If the bearings pass that test, simply re-pack them (VERY well!) , install a new grease seal, and re-install the hub, set the PROPER pre-load, install the cotter and cap, and you should be good-to-go.
HOWEVER: You DID inspect the brake shoes, magnets, and wires while in there, didn't you? Did you dab "just a hint" of hi-temp grease on all the pivot points?
Under the conditions you described, the bearings should have survived the over-temp quite well, as the grease was very likely well-below its drip-point.
Only the complete inspection will tell.
BTW, if you don't know what you're doing in there, seek out help that does!
2004 Terry 250RKS, perfect for the two of us and the pups. It recently replaced our Flagstaff 21FB.
2000 F-350 7.3L CC/LB 4WD Lariat 3:73's