I live in Arizona. These have been coming out in the evening. They are 1-2” long and looking like really skinny earthworms. I took it to the local pest supply store and they had never seen anything like it.
Update: my pest control company had never seen anything like it. They sent some examples to ASU to identify. Turns out they are a type of millipede. Very uncommon in this region.
I hope someone will chime in who’s more knowledgeable but, yeah, it looks like an earthworm to me. Just…longer? Not a sewage worm, by chance?
This site may help you match it: https://www.trees.com/gardening-and-landscaping/types-of-earthworms