Residents suspect that the underground cavity was revealed when the bottled water factory in the area pumped out the groundwater.

But the currents in the chocolate-milk-colored water in the hole indicate an underground river, according to the authorities.

Luis Aguas Méndez represents the agricultural cooperative in Zacatepec.

According to him, more than 35 families are affected and there is great uncertainty about how the hole will behave.

- The house right next to the hole, where the fence has already fallen in. So yes, it is worrying, he says.