Call 911 and get them rolling. It's the one-stop, first-responder call and the one that will get the proper help moving in your direction.
Funny story. I'm a school-house cop, a school resource officer in a high school. I work for the local sheriff's office, but I work at the high school. One day a distraught parent came into the school and I heard loud voices so I went to see what the problem was. While trying to de-escalate the situation, the lady began to berate me, insisting that she wanted the real po-lice. She called 911 and told them that she needed a police officer at the high school.
Within seconds, my radio lit up. I told the dispatcher I was on scene and had the situation under control. Then, I turned to the distraught parent. "Okay, ma'am. You called 911. They called me. How can I help you?"
You can call family, friends, neighbors, depending on the circumstance and the problem you may be having, but a 911 call will get first-responders headed in your direction.