I am now currently playing my first game of Gathering Storm, and it has been interesting to say the least.
I am doing an 8 player continents map as Australia against 7 AI civs. The AI civs are Canada, Scythia, America, Germany, Hungary, Norway and Scotland. Aside from Scotland settling one of its forward cities in a spot where I wanted to place a city, the game was going reasonably well until the year 1800 or so.
Around the year 1800, things quickly went south, when disaster struck. First, I got hit by flooding that damaged several districts / farms and cost me 3 musketeers and 1 worker, then tornados ripped through two additional cities and damaged multiple industrial and scientific districts. To make matters even worse, I then had Norway declare war on me, while also getting a notification that a hurricane is approaching my coastal city of Sydney. Talk about bad luck, three cities get hit hard by natural disasters and then Norway declares war on me. I have to repair all the damaged districts, while also trying to building more units to fend off Norway's attack. The only good news, is that Scythia and Scotland declared war on Norway and may come to my aid.
My general city approach, is to build the capital city and then surround it by 6 additional cities, each spaced 4-6 tiles from the capital city. That has generally served me well in most games, but with the addition of natural disasters in Gathering Storm, I may have to rethink this approach. In my current game, I was only able to build 5 additional cities, as Scotland blocked me from building the 6th city.