for the case of people trapped following an earthquake, the process is already being looked at and established.
1) humans have a drive for helping themselves. this means they will try to find the things they need. this can mean that when the help finally arrives, the person reporting the need may have already met that need.
2) humans have two legs. they will move between areas. a person that reports a need from a particular location will most likely not be there one hour later. as such we may not find the person reporting the need.
due to these (and other) reasons it is important for us not to track those requests 