Answer: Iris often sprout some new foliage during the fall and so should be just fine. In spring just be sure to remove any damaged foliage.
Tulips will often sprout a bit and should be fine as long as the flower buds are still underground. The leaves may get a bit tattered, but that should not affect the blooming. You could put a bit of mulch around them and perhaps a light layer of a very light and fluffy mulch such as straw or evergreen boughs over top of the tulips, but be sure to remove it promptly in the spring so they can grow normally as the season warms.
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