Flood-hit Iran is evacuating more towns and villages, with further rain expected on Saturday.
Three weeks of heavy rainfall have left much of the country submerged and cost at least 70 lives.
More downpours are forecast for the south-west, with 400,000 people at risk. Dangerously full dams are being opened to ease water build-up.
Women and children are being moved to safer areas while men have been asked to stay to assist with relief efforts.
Where are the latest evacuations?
The south-western province of Khuzestan, which borders Iraq, is the main focus.
Six towns and cities along the Karkheh river needed to be evacuated as soon as possible, Khuzestan's governor Gholamreza Shariati said.
He said the situation was critical and, despite the fears of renewed flooding, the Karkheh dam was being opened to release build-up.
Around 70 villages in the province have been evacuated in the past week. There is no order of evacuation yet for Khuzestan's capital, Ahvaz.
Iraq on Saturday closed its Sheeb border crossing to both travellers and trade until further notice.
Energy companies in the oil-rich region have helped the relief effort by using pumps to remove water.