>>927115Go for it.
>warning peopleI wouldn't worry about "warning people" ... systems already in place for that (sirens, SAME). Not worth your time.
>care for injured person>CPR licenseAs a non-professional, you're generally protected by good-samaritan laws, and you're not bound by duty-to-act. Depends on the state. Not really a "license", just that you've been trained on first aid and how to perform CPR correctly. And if that's something you're serious about, consider WFR instead.
>ham radioYes, also look into skywarn.
Having a phone should be a given.
>>927129This, and
>>927138is excellent advice.
Can't really help you with tornadoes or ice storms. I prefer snow.
>pic related, drove through here this afternoon 