That marbled noid is likely VIRUSED. Has it bloomed like this in a previous year? I say give it its last rites, dig and put in garbage, not compost. Its not worth the risk of infecting your other lilies.
Just as well you don't water them. Prolonged heat plus water can promote bulb rot. The heat accelerates the bloom season and leaf wilt won't kill the bulb for next year. This is where a good layer of mulch is useful to help cool the soil.
