As the quantum enriched petroleum spread throughout the atmosphere, the temperature rapidly increased. This triggered a rapid rise in sea levels. Massive flooding turned many major cities into swampy wastelands. Mosquito plague ran wild. These factors combined with an epidemic of tainted drinking water as the oceans mixed with natural water tables. People migrated from coastal areas by the millions. This process was referred to as the coastal exodus.
The problems that began with G-Day were vastly exacerbated by the 2022 event whereby a huge chunk of arctic ice broke off into the ocean. This generated a huge tsunami and raised the oceans even higher, pushing the surviving population further inland.