An unusual and disruptive incident has unfolded in the Kypseli district of Athens, where a thick, liquid material resembling cement has flooded several streets, forcing traffic closures and alarming local residents.
The phenomenon began on Wednesday afternoon, when the substance started emerging continuously from the ground of an abandoned building. The flow quickly spread across nearby streets, covering large sections of roadway.
Streets submerged, traffic halted
Authorities have shut down traffic in affected areas after the material reached significant levels—reportedly exceeding 60 centimeters in height—burying parts of the road and even covering the wheels of parked vehicles.
Residents have been closely monitoring the situation, as the flow has shown no signs of stopping.
Link to underground works under investigation
Attention has now turned to the nature of the material. Engineers and technical teams are working on-site to determine whether it is indeed liquid cement or a naturally occurring geological substance known as “Athenian schist.”
This type of rock forms part of the region’s underground structure and can take on a fluid-like state during tunneling operations. This has led to growing speculation that the incident may be connected to ongoing metro construction works in the area.
Resident frustration grows
Despite early warnings from locals, residents have expressed frustration over what they describe as a delayed response from authorities. So far, the official presence has been limited mainly to traffic police managing road closures.
Efforts to contain the flow are currently being handled by crews from a private contractor associated with the metro project.
