It's the whole map. All 4 tiles get dead all at the same time. weird.
First you need to:
- Make sure you have enough healthcare always.
- Make sure death care and healthcare don't get stuck in traffic jams and can reach all areas they need to reach.
If that is not the case then Magistu may be right with this from what I have noticed: "If you plop down a huge chunk of zoning at once you're going to have a lot of trouble once all of them get old at the same time."
The thing is that if you zone a huge residential area and some years down the road these houses all are filled with seniors starting to die off pretty much at the same time. This overloads your deathcare all over the map which means they don't have enough resources to pick up dead all over the rest of the map either.
To mitigate:
- Zone residential areas moderately and spread out both in space and in time when you build them.
- Spread out cemeteries/crematoriums evenly and have them connected so they can work to support local peaks.
- Watch cemeteries and empty them when you have capacity so that you can use them as a buffer to mitigate peaks.
- Raise budget to 150% for healthcare ( including deathcare ) if you see this starting to happen. ( This will increase capacity roughly by 30% while costing 50% more ).
It's similar with the school system, if you zone too big residential zones it will send a shockwave through your school-system where it will need 2-3 times as much capacity first from the elementary schools, then from the High Schools and finally from the Universities. Basically you can follow this population "boom" wrecking havoc through the ages affecting your school and deathcare systems that are population age sensitive. It's a pretty cool feature
