I live close to Lisbon (in the South margin of the Tagus river) and I can say Meshtastic was very active throughout the outage.

I received news of power coming back in the first few towns through it, before FM radio.

I needed to get closer to the river to get reliable contacts, but I've now ordered a nice antenna and a solar kit to mount a repeater in a mast on my roof so I can cover the center of my town more reliably.