My expert opinion...
It's sunny (proved by photo), very hot (proved by soft tarmac) therefore I know for a fact that the wings have gone soft hence why they are bent.
Now why upward is the question ?
Because when the aircraft due to high temperature (well above ISA which what is used as standard measurement/design) started to melt, it happened so quickly that the A/C dropped (Gravity) but at the same time it got nearer its own shade (cooler) therefore cooled down pretty much instantly, leaving the winglets hardening whilst in motion.
A bit like a fossil