good wiki

Amateur radio emergency communications

In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail. Unlike commercial systems, amateur radio is usually independent of terrestrial facilities that can fail.

More at Wikipedia

About

You might be interested in

American Red Cross

The American Red Cross is a humanitarian organization in the United States that provides emergency assistance, disaster relief, and education and training in various health and safety fields.

National Weather Service

The National Weather Service (NWS) is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the purposes of protection, safety, and general information.

Red Cross

Satellite

A satellite is an object that orbits another object in space.

United States

The Wikipedia page on the United States provides a comprehensive overview of the country.