From my personal experience, mostly just in the car. Here in Portugal there was a rather well-timed rail strike today, so a lot of people who would've taken the train drove instead and had a way to get back and listen to the radio. From what I could tell from the radio reporting, handheld radios and batteries were rather quickly sold out.

I've got to give massive props to Antena 1 too, which is the national broadcaster's main radio station, who stopped all normal programming and did an all-day massive report on this situation to keep people informed. From what I could tell they didn't even run any ads during that period, just all-day reporting continuously repeating key information for people who'd just tuned in.