As a native of the southeast U.S. getting ready to move to San Francisco, earthquakes terrify me -- I've never felt one before. Hearing about last night's 5.6 quake doesn't make me feel any better. I just discovered this emergency alert service that will at least help to keep us informed.
during the San Diego wildfires, lots of people subscribed to KPBS's (local npr radio station) twitter stream as a way to get updates on evacuations. KPBS also had a really good google map up in the first few hours, and was way ahead of everyone else in keeping it up to date. (fwiw i live in SD, work in an area that was under threat of evac).