We received an update about the explosion and fire at the AirBNB in Guanajuato. The owner sent us a copy of the official investigation report.
The explosion was not caused by a gas leak. There was a cell phone left charging overnight. The phone’s battery overheated and exploded, starting the flammable furniture and curtains on fire. Then someone opened a door causing a rush of oxygen and a backdraft (which was the big boom we heard).