7DTD Heatmap & Screamer Risk Estimator
The heatmap is completely invisible in-game — there is no heat meter, bar, or indicator of any kind. This tool estimates how fast heat builds at your base and how many real-world minutes you have before a Screamer spawns. Configure your active devices below and the result updates live.
Server Settings
serverconfig.xml DayNightLength — default 60
Start from 0% if unknown. Use event heat below to add one-time spikes.
Active Crafting Stations & Devices
Only count devices that are currently running or lit. An idle forge produces no heat.
One-time Event Heat (adds directly to current %)
Heat Rate
0/min
% heat gained per real minute
Current Heat
0%
Including event heat & starting %
Time to Screamer
No active devices
Real-world time from current heat
How the Heatmap Works
Heat accumulates as long as devices are actively running — a forge with an active crafting job, a lit campfire, a powered workbench. When the heat meter reaches 100%, the game spawns a Screamer zombie 30–50 blocks away from your base and resets the heat to 0%.
Screamers are dangerous not because of their own damage but because of their scream ability — every scream summons a wandering horde. Kill them quietly (knife or bow) before they scream, or keep your heat low enough that they never spawn.
Heat decays naturally when you power down devices. Running everything at once overnight is the fastest way to trigger repeated Screamer spawns.
Heat Reference Table
| Device | Heat/hr | Hours to 100% (alone) |
|---|---|---|
| Forge | 6% | 16.7 hr |
| Campfire | 5% | 20 hr |
| Chemistry Station | 5% | 20 hr |
| Workbench | 5% | 20 hr |
| Cement Mixer | 5% | 20 hr |
| Dew Collector | 2% | 50 hr |
| Torch | 1% | 100 hr |
| Burning Barrel | 1% | 100 hr |
| Candle | 0.5% | 200 hr |
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