U.S. utilities have a deep culture of mutual aid. After a hurricane, trucks roll in from states that still have power. That system is a genuine achievement, and it depends on the damage being local and the replacement parts being ordinary.

The trucks carry crews, poles, wire, and the ordinary hardware of a distribution system. A neighboring utility can spare those things because the hurricane did not hit its own yards. The bargain is simple: this season you help me, next season I help you, and both of us still have a system left standing.

A geomagnetic storm or a wide electromagnetic insult breaks the assumption. The damage mechanism hits many regions at once, and the scarce part is not linemen. It is equipment that was already on a long lead time when times were calm.

An extra-high-voltage transformer is not a pole. It is a large, often custom machine, built to a specification, moved on a special trailer, and installed on a pad that was engineered for it. When several regions need the same class of unit, the mutual-aid roster still answers the phone. It just does not have the part in the truck.

That is the shared scar. A hurricane leaves a clean edge: damaged here, intact there. A continent-scale insult smudges the edge. The utility that would have sent the spare is checking its own neutral currents, its own hot units, its own lead times.

Regional spare pools are the grown-up version of mutual aid for this threat. They are also expensive, which is why they remain thinner than the speeches.

A pool only works if the machines in it match the units that failed, if the transport still runs, and if the agreement about who draws first was written before the week got loud. None of that is a speech. It is a warehouse, a trailer, and a contract.