They may leaf out again. This happened to one of my trees when it was waterlogged in the spring.

The real danger is that they may leaf out too late, so the tender growth gets hit by freezing weather.

I'd suggest starting over by planting on mounds at least 18 inches high. Even if your trees survive this bout they won't last long in those conditions.

Depends a lot on whether those conditions are an anomaly or a regular occurence. Moving the trees now wouldn't help them, so starting over would involve new trees, not saving the existing ones.

Thanks for the thoughts. It hasn't happened this way for about 25 years. I have my fingers crossed they will leaf back out.

You have time. If they don't leaf back out, you'll know you have to replace them either this fall or next spring, on higher ground. If they do, you can decide whether to take the chance with them or not.