A gas leak underneath the Pemex Executive Tower in Mexico City caused an explosion that killed at least 37 people and injured another 121.

The Pemex Executive Tower is an office skyscraper in Mexico City. The 211-metre (692 ft) international style tower was built between 1979 and 1984. Since the building's opening, it has been occupied by state-owned Pemex, one of the largest petroleum companies in the world.

Mexico City is the capital and largest city of Mexico, as well as the most populous city in North America. It is one of the most important cultural and financial centers in the world, and is classified as an Alpha world city according to the Globalization and World Cities Research Network (GaWC) 2024 ranking. Mexico City is located in the Valley of Mexico within the high Mexican central plateau, at an altitude of 2,240 meters (7,350 ft). The city has 16 boroughs or demarcaciones territoriales, which are in turn divided into neighborhoods or colonias.

On 31 January 2013 in Mexico City, an explosion caused by a gas leak occurred beneath Building B-2 at the Torre Ejecutiva Pemex, a skyscraper complex that is the headquarters of Pemex, the Mexican state oil company. At least 37 people died and another 121 were injured when an explosion occurred in a building adjacent to the main tower. Earlier in the day, Pemex sent out a tweet saying that the building was being evacuated due to a "problem with the electrical system" in the complex that includes the skyscraper.