Unable to push local database to heroku using pg:push - postgresql

I am working on a Flask project, and I am ready to deploy my database to Heroku, but I am getting the following error when I try to push my local database to my PG database. I have searched through other StackOverflow posts, but no proposed solutions seem to work. Here is the error message:
pg_dump: [archiver (db)] connection to database "database-name" failed: could not connect to server: Connection refused
`Is the server running on host "localhost" (::1) and accepting`
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (fe80::1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
pg_restore: [archiver] input file is too short (read 0, expected 5)
psql: could not connect to server: Connection refused
Is the server running on host "localhost" (::1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (fe80::1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
! Heroku client internal error.
! Search for help at: https://help.heroku.com
! Or report a bug at: https://github.com/heroku/heroku/issues/new
Error: psql failed. exit status 512, output: "" (RuntimeError)
Command: heroku pg:push database-name DATABASE_URL --app app-name
Version: heroku-toolbelt/3.39.5 (x86_64-darwin10.8.0) ruby/1.9.3
Error ID: 020bc5cc53ec48298f24125be8705f53
Any insight would be much appreciated. I have been struggling with this for several hours. Thanks!

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