It is then better to move the hive to area where it gets pollen. It cannot be so that every place has been dried up.
When it is heavy drought, it takes really long time that nature wakes up after drought.
After that situation hives are not able to overwinter. It needs heavy rains too to recover.
So split the hive, put a mesh to stop bees escape and move the hive to proper place.
Depending size of hive, it takes not much time.
If we have this time of year (end of July) difficult drought, the vegetation will not start new growing. It prepares itself to winter.