I am preparing to run Waterdeep: Dragon Heist and was wondering how many inhabitants Waterdeep has.http://dnd.wizards.com/dungeons-and-dragons/what-is-dnd/locations/waterdeep …
Here I found that it is about 2 million, which greatly surprised me. Is this correct for Waterdeep in 1492 DR? Yes, but it depends on the time of year: rises in spring, at its crowded height in the summer, sinks in fall, smallest in winter (because many wealthy citizens go south to escape the cold and clinging damp shore fogs).

— Ed Greenwood (@TheEdVerse) January 26, 2019