Foxy Lady:

I know exactly what happened.  We've had lots of rain and rain makes the blooms of petunias turn to mush.  All you need to do is pinch off those mushy flowers and it will send out new blossoms in a few days.  Petunias usually need a lot of water, but their flowers can't take the beating a heavy rain does to them.  Don't worry...it is not dying, just needs a little TLC to force new blooms

By the way, mine look the same