Three classrooms damaged in Hamlin Middle School fire Corpus Christi Fire Department are working an early-morning fire at Hamlin Middle School. and last updated 2020-12-17 11:54:35-05 CORPUS CHRISTI, Texas â Hamlin Middle School officials say a window unit caught fire early Thursday morning, causing a fire that damaged three classrooms at the school. School officials say that "a few rooms" were without electricity for their instruction today, leading to moving those students to other areas in the school building. Firefighters say that a fire that started around 4 a.m. caused major damage to three classrooms at the school, at 3900 Hamlin Dr.