You need at least one emergency radio capable of tuning into the "weather bands" used by the National Oceanic and Atmospheric Administration (NOAA). The Midland Digital Weather Radio stands out, because it runs on a range of power sources. Normally, its lithium ion battery charges via USB, but if the power goes out, you can hand-crank it, add in AA batteries, or rely on the small, built-in solar panel. Additional features include an ultrasonic dog whistle to signal search-and-rescue teams and an extra-bright, 130-lumen LED flashlight you can set to an SOS pulse. Best of all, if the NOAA puts out an alert, the units beeps and flashes, so you know to listen up. Available at Amazon; $69.99.