Alerts come to you in two ways: text message and phone call. An alert via text message looks like this:

Clicking on the "Tap to load preview" link will reveal a map of the KATANA Safety user’s location like you see below.
This is where you can show your availability to assist by choosing: "I can help" or "I cannot help." Also, you see who else has been notified and whether they can help.
Your phone will ring and prompt you to stay on the phone to be joined in a conference call with other Circle members so that together, you can coordinate next steps.