Check with your local United Way. You should be able to call 211 from any landline phone and get connected to them. You can also contact your local Dept of Human Services through 211 and they could give you a few resources to help as well.
I am not sure what "tri-county" is but I have a few resources for Tarrant Co.
There is a hotline for Aged or Disabled Services. 877-236-6500
Also, I have listed Mission Arlington ###-###-####. I'm not sure if they help with utilities or not though.
One thing you could do is go to your local hospital's ER and ask for a list of local resources or a Resource Information Packet. Most hospitals have these on hand for discharging ER patients that have no insurance or are low income families.
Hope this helps!