Why is communication so important during an emergency?

Its very important for many reasons but, the main reason is saving life, communication is really important to save others life's. can you imagine the world with no internet, no you can not, not because you cant play anymore, it is because you can not search, phone, communicate at all!. we can use internet in emergency in order to inform others really fast so no life's are wasted. in the old times, when people had no internet they had to run or ride a horse to go to anyone who can help, in other words Internet is important more that what you think!!!.