Water was left standing for sever ahours on my laminate floor. Edges are lifting. What can I do?

Very little really.
Dry it out and hope for the best.

Thanks, I was afraid of that.

Therein lies the laminate problem. You can try to set bricks or HCB on the floor with a towel underneath and hopefully the weight will push them back a bit. I have also done some with a thin application of glue between the layers, using a toothpick, and then wax paper and weights.