The unprecedented floods that have devastated large parts of Iran since March 19 have finally affected its oil production.

The oil-producing Khuzestan province in the southwest has seen waves of floods, with the latest inundation the result of maximum outflows from two large dams that have reached full capacity.

Karim Zobaydi a member of Iran’s National Oil Company told the government’s official news agency IRNA that oil production in some fields has come to a halt due to flooding.

Zobaydi said that oil wells have been flooded in Ab Teymour, Mansouri and Azadegan fields and in area 3 of Ahvaz some oil delivery pipes and wells have also been damaged by floods.

Ahvaz is the capital of Khuzestan province and has seen late floods in recent days due to excess water let out of dams further north.

The areas mentioned by the oil company official generally lie to the west of Karoon River. The area produces 350,000 barrels of oil per day.

Although the reduction in oil production is a significant setback, especially if the flooding leaves a long-term impact, Iran currently is unable to export at full capacity due to U.S. sanctions and can use its excess production capacity to satisfy domestic needs.