NOAA Weather Radio All Hazards is what would work in these situations, and it uses FM in VHF range. If the only goal is for emergency information purposes, then the receiver could be set up for that. The existing Weather Alert radio system in the US is designed to automatically activate receivers when alerts are sent out.
The problem is that although the system allows for use in many types of disasters including wildfires, toxic chemical releases, etc., in reality it is almost exclusively used for severe weather alerts because it is operated by the National Weather Service and NOAA, and they are obviously focused on weather events.
Weather Alert Radios certainly can save lives in tornado prone areas for example, since they will sound alerts loud enough to wake people up and then automatically tune to the alert broadcast. These radios and alerts would have also certainly saved lives in the recent Northern California wildfires where residents were unable to receive cell phone alerts due to the cell system being down in the area. It seems feasible that FM receivers with Weather Alert capabilities built into mobile phones could be beneficial in these situations, provided the alerts are sent out.
The problem is that although the system allows for use in many types of disasters including wildfires, toxic chemical releases, etc., in reality it is almost exclusively used for severe weather alerts because it is operated by the National Weather Service and NOAA, and they are obviously focused on weather events.
Weather Alert Radios certainly can save lives in tornado prone areas for example, since they will sound alerts loud enough to wake people up and then automatically tune to the alert broadcast. These radios and alerts would have also certainly saved lives in the recent Northern California wildfires where residents were unable to receive cell phone alerts due to the cell system being down in the area. It seems feasible that FM receivers with Weather Alert capabilities built into mobile phones could be beneficial in these situations, provided the alerts are sent out.