The unrelenting rain of the past weeks has undermined the old Tripoli-Kalamata national highway to the point where it is in danger of subsiding and sliding down the slope at Derveni, local authorities reported on Monday.

They said the phenomenon was being closely watched and road signs put up to warn drivers. The construction company building a new road for the region has been instructed to quickly create an access road so that, if the current highway subsides, the region of Messinia will not be cut off.