I'm in Massachusetts, and have gone through this many times over the years. I'm always concerned, especially because I so look forward to those harbingers of spring, and don't want them having nothing left to bloom at the proper time! In general I agree with the advice you've already been given, and have learned from experience that the bulbs will go dormant again on their own when the ground gets colder. However, since most of mine are in the sun, I can slow them down, or prevent new growth, by giving them some shade during the height of the warm sunny days. Both of the following methods work for me:
I have a sturdy small plastic stool which I use for my gardening. Stand it over the the affected bulbs. The sides are open enough to allow for airflow, but not enough to let in a lot of sun. It weighs very little, so I can easily move it around, then put it away for the winter once the problem is resolved.
You can turn a large planting pot upside down and gently place it over your active bulbs. Depending on your situation, one large or a few small pots will do. If it's windy, just put a rock on top. Only do this in extreme situations, and for very short periods of time. Anything that holds in heat may keep the ground warm enough to encourage more growth, which is exactly what you're trying to avoid!
Bulbs are wonderfully resilient. As you said, we in New England got crushed last year! When we had three feet of snow on the ground until far into April, I figured my bulbs would skip the whole season. Happily, the flowers just showed up late, none the worse for wear!