These are for residents of the United States. There are many more hotlines out there but, here’s some of the common ones.
Crisis text line: 741741
National suicide prevention lifeline: 1-800-273-TALK (8255)
Online peer support chat: 1-888-843-8255
National youth crisis hotline: 800-442-HOPE (4673)
Eating disorders awareness and prevention: 800-931-2237
I found a link to warm lines. I have never heard of this until researching. Thought I would add this to my list.