Great review! Let’s say an extreme event happens, like an electromagnetic pulse or a coronal mass ejection. Assuming your radio still works, you try to tune into local FM stations but receive nothing. You could also tune into an AM station (if it’s night-time). This is a good reason to keep a list of clear-channel AM radio stations handy. At night they blast out at maximum power and can be heard 1,000 miles away. Most of them are the type of station that reads 5 minutes of the news at the top of the hour. I went through the list one time and was able to bring in more than 30 stations between 100 and 900 miles away (I live in the Eastern time zone). The limitation is that you can generally only hear them when it’s dark out. Still, another tool in the toolbox. https://en.wikipedia.org/wiki/Clear-channel_station#List_of_all_clear-channel_stations