Here are a few new things the Victor crew found in iOS 11 for use in emergencies.
You can add Medical ID for emergency contact. Open the Health app and tap the Medical ID tab. Edit then scroll to Emergency Contacts. Press the + and it will take you to your contacts. On this page, you can also add medical conditions, notes, allergies, and medications as well.
There is Emergency SOS where you can call for help quickly. The Emergency SOS slider and Medial ID slider you can bring up to quickly contact emergency services. For iPhone 7, you will need to press the side button five times to get the sliders to show. For iPhone 8 or X, you would press and hold the side button and one of the volume buttons. After the call ends, the iPhone sends your emergency contacts a text message with your current location unless you cancel. If you have your location services turned off, they will turn back on temporarily.