I wouldn't adjust the door itself..changing the thickness will make it look odd... I would adjust hinges and and a scribe the door stops and follow the curvature. It will look fine I've done many.
Straightening may be hit or miss.. I suspect the wood will return to is preferred state once dried or tension is released.
That's pretty standard, could be movement in the frame (house) or door. The hot weather causes a lot of expansion in front doors especially if they're painted dark colours.
I wouldn't adjust the door itself..changing the thickness will make it look odd... I would adjust hinges and and a scribe the door stops and follow the curvature. It will look fine I've done many.
Straightening may be hit or miss.. I suspect the wood will return to is preferred state once dried or tension is released.