Warped slab of Kauri.. FIX?

HI All, just a query, I bought a beautiful very old slab of Kauri, 2200 x 600 by approx 45 thick..

It was flat, but in the 3 months i've had it , it has now warped from one corner to the opposite corner longways..thus a twist.

So the table i was going to make out of it is not gonna happen in this state..

I guess the change in moisture from Geelong where i bought it, to melbourne where it now is, had its way with it.



Any recommendations on how to perhaps fix it? Like lay it flat & put weights on the 2 corners that are lifted..

or wet it down & do the same... or??



Thanks..