Transit app – button or toggle?

I'm designing a prototype for a mobile app that allows you ask for help inside a public transportation (bus or streetcar). The goal is to alert all passengers that someone needs help inside the same car as they are (so the user doesn't need to contact people individually). Help can be something as simple as the person is feeling sick and needs to a place to sit or someone is harassing them.

The button sends a distress signal to everyone in the car (they will get a notification as a personal message). I will display via AR where the person is located (another feature that is not on this prototype) but I'm wondering on whether or not I should place a button or a toggle for "request help". I initially thought about a toggle because it allows you to turn it off if the problem was resolved. I have another version which I replaced "request help" for "send distress signal"

"AR view with distress signal"