Find the Automated Emergency Broadcast System before your first serious supply run. In Project Zomboid, it is the only vanilla system that warns you about the electricity timeline and the day’s helicopter event. It also forecasts severe weather. The catch is just as important: it never warns you about the water shutoff.
Get AEBS on a Radio You Can Keep
In Build 42, each world rolls AEBS between 88 and 108 MHz in 0.2 MHz steps. That leaves 95 possible frequencies, so another save’s number is useless. The frequency belongs to the world, not the survivor.
Check police cars and ambulances first. Their vehicle radios carry the AEBS preset, and a vehicle radio runs from the car battery without the ignition key. When you find one, note the frequency and save it as a preset on another radio. Keep a portable, battery-powered radio in your inventory: it survives the electrical shutoff without needing a generator.
No emergency vehicle? Scan the FM band in 0.2 MHz steps around the top of an in-game hour. When a channel identifies itself as the Automated Emergency Broadcast System, write down the frequency immediately and save it on a second device. One written note in your base is more reliable than trusting a single radio to survive your next loot run.
Turn Each Hourly Report into a Decision
AEBS broadcasts at the top of every in-game hour. The report’s useful lines arrive in a predictable decision order:
The hourly AEBS report starts with weather information.
| Report stage | What you hear | Decision |
|---|---|---|
| Today’s weather | Temperature, humidity, wind, and current conditions | Choose clothing and decide whether outdoor work is sensible. |
| Tomorrow’s weather | The next day’s forecast | Schedule travel, farming, and other exposed work. |
| Severe weather | Major storms and extreme conditions, often announced 2–5 days ahead | Stock supplies and move risky work before the weather arrives. |
| Two days before blackout | “Knox Power Grid: Power fluctuations detected” | Finish generator, fuel, refrigeration, and battery preparations. |
| One day before blackout | “Knox Power Grid: Systems failing. Network compromised” | Move perishables and activate the backup plan. |
| Blackout and after | “Knox Power Grid: Blackout” | Treat mains electricity as gone; use a generator or battery-powered equipment. |
| Helicopter day | “Air Activity detected” at the end of the report | Execute the helicopter plan for that day. |
| Background fragments | Static-heavy military or communications reports | Treat them as atmosphere unless they contain one of the warnings above. |
The weather portion can also cover the day after tomorrow when a longer-range warning is relevant. You do not need to memorize every sentence: wait for the hourly report, identify which row changed, and make that row’s decision.
Use “Air Activity detected” Before the Rotors Arrive
“Air Activity detected” means the helicopter event is scheduled for the current day. It does not give the arrival minute and does not mean the aircraft is already overhead. Your Sandbox helicopter setting determines whether events exist and how often they recur; AEBS supplies the day-of warning.
If you have not been spotted, close the curtains, move into an interior room, keep noise low, and wait with food and water ready. Do not begin boarding windows, firing guns, or taking a long outdoor loot run after the warning; those actions add noise and exposure while the helicopter is about to move zombies through the area.
If the helicopter has already tracked you, drive only when all four conditions are true: the vehicle starts reliably, it has enough fuel for the detour, you know a clear route out, and you can end the migration away from your main base. If any condition fails, stay inside and let the event pass. The warning gives you time to choose; it does not make an improvised evacuation safe.
Store Water Without Waiting for a Broadcast
AEBS reports the electricity shutoff, not the water shutoff. The two utilities are separate, so a normal grid report does not guarantee that sinks, toilets, showers, or bathtubs will still work.
Fill clean containers while the plumbing works, and prepare rain collection or a well before you need it. Do not read “Blackout” as a combined utilities alert: it describes electricity only. A placed radio also needs grid or generator power after the shutoff, while a portable radio can keep receiving AEBS from its battery.
The practical rule is simple: use the AEBS to time your generator and helicopter preparations, and use stored water to cover the water shutoff the radio never sends.