Correct, Rusted Stilettos turf.
In addition to Glow Rats (p. 95-6), Howling Shadows also has Radhounds (p. 100) and Razortcats (p. 102). Also see Angel Squirrels (p. 93). There are also rules for Energy Aura: Radiation (p. 190).
Don't forget Elemental Attack: Radiation from Street Grimoire (p. 195). "Nuclear" is a Toxic Spirit of Fire (p. 88), and Radiation Beam/Burst are Indirect Combat Spells (p. 105). There's also a sidebar on p. 105 that talks about Radiation damage and how powerful it is (armor doesn't apply, it acts as a toxin causing Nausea, etc.). Nasty, messy stuff.
5E's Seattle Box Set has a few more details (p. 61 of Emerald Shadows, specifically). It notes that the dragon Kalanyr has taken an interest in Glow City and has been purchasing land there. A group of toxic shaman called the Isotopes work for Kalanyr, in exchange for cleansing their irradiated bodies.
Target: Wastelands has a brief mention of Glow City on p. 12 but it's nothing very helpful. Same with Runner's Companion (just a blurb on the Rusted Stils, and that an apartment in Glow City would qualify for the Haunted quality for a Lifestyle). Same again for Brainscan, which has a couple quick mentions (p. 32 and 40)in the context of Glow City being home to the Rusted Stils.
