“The exercise was held from May 8 to 9, 2024, at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, and at a Federal Emergency Management Agency (FEMA) site in Denver, Colorado.”
Article refers to a PDF of the report it’s based on:
https://www.jhuapl.edu/sites/default/files/2025-04/Space-Weather-TTX-Report-Summary-v3-FINAL.pdf
The breakers at transformers in each neighborhood would surely trip before frying a house I would think.
They go whenever a tree comes down near our street anyway.
The voltages involved are more likely to cause the transformers to explode rather than just tripping the breakers.