Two natural gas explosions occurred in the same Texas neighborhood on the same day as the first blast, which injured five people, including a child. The first blast hit a home in the 15000 block of Preston Hollow Drive near Thousand Oaks Drive at 6 p.m. A second two doors away, which occurred two hours later, caused a roof to collapse and insulation across the street. The injured included Kim Nowell, a math teacher at MacArthur High School, and her daughter, a student at the same school. The National Transportation Safety Board (NTSB) classified the blasts as natural gas-fueled and announced it will investigate why the block was not evacuated before the second explosion. The area was evacuated and authorities shut off gas and power across the area.