Indeed, although the article refers to a solar storm, and not an EMP event, the effects on grid transformers would be similar.

EMP is a pulse of electromagnetic energy produced by a nuclear detonation, A solar storm is a natural event, that induces undesirable currents in long conductors such as grid lines.

A solar storm would only damage transformers connected to grid lines, spares or units switched out for maintenance would be safe.
However only a very few spare large transformers exist, and they are manufactured to order.
Smaller transformers are less of a problem since utilities hold stocks of spares, and they can be manufactured readily.

The EMP event is more concentrated than a solar storm.
EMP could kill a radio or TV connected to an aerial, a solar storm would only damage equipment connected to long grid lines.

Beyond normal disaster preps (food, water, fuel, shelter, defence etc.) there is nothing that an individual can do about solar storms.
Individuals can however prepare, at least to some extent for EMP events.
Spares should be stocked of useful electronic goods such as radios, landline telephones, GPS units, solar charge controlers etc etc. These should be stored completly enclosed in metal which will at least partial protect against EMP.