Salt of the Earth
I almost set this in Houston, which also stores its natural gas in salt domes outsid ethe city, but then I realized I could set it in Saudi Arabia, one of the few places better known for oil and gas than Texas.

Salt of the Earth
In the center of Jeddah, the richest city in Saudi Arabia and the whole Middle East, were cheap businessmen who thought they were smart. They sat in the top floor of the tallest building in the city, and smoked cigars and congratulated themselves on being smart. Global supply and demand forces had skyrocketed energy prices, and these oil and gas producers were the benefitters. They hadn’t improved Jeddah’s infrastructure in years: the oil and gas was pumped from old oil rigs into huge undergroundsalt domes outside the city that had been constructed years previously. They saw their lack of infrastructure investment as a needless expenditure. It would actually result in their deaths. The businessmen controlled the whole city of Jeddah, and decided to skip infrastructure investments in the city sewage system as well. Jeddah’s sewer system is leaky, and the leaks had eaten away at an undiscovered salt dome directly under the tallest building in Jeddah. The sewer leak met up with an unmaintained leak in a storage salt dome, and air pressure pumped the natural gas from one dome to another. A leaky salt dome full of natural gas is a bomb waiting to go off. A cigar butt was believed to be the spark. The inferno looked like a volcano for an hour, jets of flame bursting around the tall building and scorching the concrete sidewalks. Then the infrastructure holding the building over the dome gave way, and the entire building fell down the salt dome like an elevator down a shaft.