Lines sag in heat. Trees take them down in wind. Geomagnetic current heats the transformers at the ends. None of these causes agrees to wait its turn. A late-summer week with a solar storm on top of a heat wave is the realistic compound case, and it looks like “the grid is old” because the grid is old.

Sag is clearance. A span that sat above the brush in spring hangs lower when the metal is hot and the load is high. The tree did not have to lunge. The wire came down to a distance that used to be enough. Heat is a demand story about air conditioners and, on the same afternoon, a geometry story about wire.

The current a geomagnetic storm drives is not the ordinary current those transformers were built around. It heats them. A unit already working hard in a heat wave has less room left for that heat. The weather desk and the space-weather desk are two stresses on the same iron.

A hearing that demands the single cause will get a tidy answer and the wrong lesson. The crew can point at a tree, a relay, or a hot day, and more than one of those can be true. The preparedness question is whether the line still had margin when the second cause showed up.

Maintenance — the unloved work of cutting trees and replacing units before they die — is electromagnetic preparedness. It just does not photograph like a shield.

Replacing a unit before it fails is how a storm week avoids discovering that the spare was a paragraph. Cutting the tree is how sag has somewhere to go that is not a fault. Both are slow, local, and easy to defer in a budget year that prefers a project someone can pose beside.

When you see a utility trimming aggressively, you are watching the cheapest resilience program in the sector. It will annoy people who wanted the shade. It is still the work that keeps a compound week from starting with a fault nobody needed to donate to the storm.