Harris County Emergency Services District No. 4 (the "District") was created on January 28, 1984, as a Rural Fire Prevention District and converted to an Emergency Services District on March 9, 1994, in accordance with Article III, Section 48-e, of the Texas Constitution. The District operates under Chapter 775, "Emergency Services Districts" of V.T.C.A, Health and Safety Code. The District was established to provide operating funds for the contracting of fire prevention and emergency medical services within the boundaries of the District.

The District is a direct provider of Huffman Fire for the community of Huffman. Huffman EMS was established on September 1, 2017. The District also changed from Huffman Volunteer Fire Department to Huffman Fire Department on February 10, 2020 and continues to provide the services of fire protection and suppression.