Dial 988 in the US to reach the National Suicide & Crisis Lifeline.

Also…

The Trevor Project provides help and suicide-prevention resources for LGBTQ youth; their number is 866-488-7386. 

Find other international suicide helplines at Befrienders Worldwide (befrienders.org).

The National Alliance on Mental Illness and Mental Health America both offer lists of “warm lines” for people in need.