Not every electromagnetic weapon is a nuclear burst in space. Military research has long included conventional devices that generate a sharp local pulse — enough, in principle, to upset electronics across a campus or a port. They are not a substitute for a high-altitude detonation, and they do not paint the Eastern Interconnection.

The literature is not a rumor, and it is also not a map of a city. A conventional device of that kind is a local problem with a local footprint: a campus, a port, a facility. It is not a season of solar weather, and it is not a high-altitude burst. The Eastern Interconnection does not experience a campus-sized insult as a continent-sized one.

Local is still serious if the target is a control room, a dispatch center, or an airfield. Hardening those buildings is a known engineering job: shielding, filtering of cables, clean power.

Known means the work is the ordinary engineering of sensitive rooms, done completely or not done: a shield that is actually continuous, attention to the cables that would otherwise carry trouble inside, power that does not assume the outside feed is clean. It is expensive and dull. A control room that has skipped it is betting the local case never arrives at its door.

Households should not reorganize around a backpack device. Cities should not pretend dispatch centers are just another office.

A household does not gain anything by redesigning daily life around a weapon aimed at a port or a dispatch radio. The household plan remains the outage plan: water, light, paper, the block. Confusing that with a local strike on a facility produces purchases, not a safer week.

Cities and the agencies that run dispatch, ports, and airfields are the scale the local case actually names. Treating those rooms as ordinary offices is the mistake at that scale. Treating every living room as a target is the mistake at the other scale. The difference is the footprint.