Annalee Newitz, author of Four Lost Cities, explains that urban collapse doesn't look anything like dystopian fiction would have it:
It’s always lurking just around the corner, seductive and terrifying, but it never quite happens. Lost-city anxieties, like the ones aroused by the pandemic, result from a misunderstanding of what causes cities to decline. Pandemics, invasions, and other major calamities are not the usual culprits in urban abandonment. Instead, what kills cities is a long period in which their leaders fail to reckon honestly with ongoing, everyday problems—how workers are treated, whether infrastructure is repaired. Unsustainable, unresponsive governance in the face of long-term challenges may not look like a world-historical problem, but it’s the real threat that cities face.
This slow-motion catastrophe—a combination of natural disaster and political indifference—was far more important to [Angkor's] transformation than the Ayutthaya invasion [in 1431]. And it stands as a warning to many cities in the U.S. Without a coherent response from local government, cities lashed by climate change will gradually lose their populations. The demise won’t be spectacular, even if the storms are monstrous. Instead, people will leave in dribs and drabs, and the exodus could take generations.
So, I'm going to stay in Chicago, which will likely remain a thriving urban center for hundreds more years.