cell - phones with their control and voice bands and their wide spread presence plus the good coverage of the us by cell towers makes a pin - pointed alert broadcast to people end angered by severe weather possible , based on data - feeds from noaa , or by other incidents . alert - specific programs in audio , video and text are downloaded to subscriber cell - phones . alert - specific code words trigger these programs in areas covered by selected cell towers . persons of priority having a roster of the cell phone numbers plus respective coordinates of their family members in their cell phone memory can view their dependent &# 39 ; s location on their display relative to the incident coordinates for aiding in a decision on safety measures . after an incident the p 1 &# 39 ; s and p 2 &# 39 ; s family roster in the cell - phone &# 39 ; s carrier &# 39 ; s memories and in the data center can help in family reunions and in rescue efforts .