Yes, I think Lycoris, too. There is this farce that says L. ×squamigera likes the shade. While it is true that they return healthily year after year in such a condition, they don't bloom because the bulb never gets the summertime heat needed to induce flowering. I would think being more summer dry would be a plus, but in my experience in Minnesota, it doesn't seem to make a difference. My best clump grows in full full full sun.
Blooming after a heavy rain? Well if it is following a drought, then yes. For me, they usually just decide to come up when they want.
But in 2023, something different, because we were going through a long drought period, and this clump of many bulbs sent up one stalk in mid August. Then we had a good heavy rain, and all the rest came up as normal. See here:
Of course, it is the Zephyranthus spp. that are the true Rain lilies.