With Houston heat indices exceeding 105°F and overnight lows staying above 80°F during summer heat waves, a failed AC is a health emergency — particularly for elderly residents and households with children. Emergency HVAC contractors in Houston provide 24/7 service throughout the Greater Houston metro, with typical response windows of 2–4 hours. Emergency service fees run $150–$350 plus parts and labor; summer premium surcharges are common. Common emergency calls include complete AC failure during heat events, refrigerant leaks, compressor failures, and condensate overflow shutoffs. Texas TDLR-licensed contractors below serve Houston, Katy, Sugar Land, The Woodlands, Pearland, Cypress, Spring, Humble, Pasadena, and Baytown.