That’s exactly what happened to Pacific island countries of Tuvalu and it’s neighbor Tokelau. Saltwater intrusions have rendered their groundwater undrinkable and the strong La Niña has reduced the amount of precipitation to these countries. Rising sea levels and climate change are at least partially to blame.
Modern Island countries around the world have very little resources they can depend on year around. Even though the climate change to these areas has brought little rain and the other factors such as rising sea levels and climate change, these island countries need to have back up plans for such catastrophic events