Daylilies are very common in our area, though we have such dry conditions and extended droughts that it is possible rust has a harder time taking hold.
But, there are so many rust resistant varieties, that even here, that is what landscapers use. I think many civic places (parks, medians, public buildings, etc) have narrowed their choices over the years, but with so many that have a track record for resistance, there's quite a variety to choose from. Gold edges, complex eyes, tets, dips, small and tall ... they are all represented.
