Largest Us Cities By Population 2024. It is perhaps unsurprising that the majority of the most populous cities in the world are in the two most populated countries in the world, china and india. Across the world's largest cities, wri estimates the longest heatwave each year could last 16.3 days on average under a 1.5c scenario, but 24.5 days at three.

A return to big city population growth and reduced losses. For the most recent data available, please refer to the vintage 2023 data.