What makes you say that?

I'm not 100% sold on it yet, but my city has always been "welcoming" to homeless folks and it has never been a huge problem. Now it looks like an actual zombie apocalypse out there in some parts, and there are periodically meth busts of hundreds of pounds in just random apartments, not even kingpin types.

Combined with the anecdotal evidence from social workers, there's a whole lot of smoke out there that the "new meth" theory might explain.