Dashboard pad

I own a 1997 Ford Taurus GL. The problem I am having is with the Texas heat. It seems thet the hot Texas heat is getting the best of the dash pad on my cars dashboard. the pad is starting to come lose from the dashboard by the windshild and right above the insterment panel. It is starting to look bad. My question is how do i fix this problem and keep it from doing it again. Any help would be deeply appreiacted very much.