So the right solution to this problem is the "Mayday" integrated application. By using Mayday application, you can send an emergency message to your closest relative or friend with a single tap.
To prevent a message being sent accidentally, there's is a feature to enable or disable user authentication. Also you can attach your current rough location with your message.
So the "Mayday" is the right companion for you an emergency situation. It's good to take precautions before something happen and Mayday might do you a life saving job someday.