Authorities in Iran on Saturday began to evacuate more towns after forecasts of new round of rains and flooding, state TV reported, as the death toll from the recent floods after three weeks of heavy rainfall in which as many as 70 people were killed.
More downpours were forecast for the south-west, with 400,000 people at risk. Floodgates of dangerously full dams were opened to ease water build-up, reported BBC News on Saturday.
Women and children were moved to safer areas, while men were asked to stay and help in relief efforts.
Six cities and towns along the Karkheh river needed to be evacuated at the earliest, Khuzestan's governor Gholamreza Shariati said.
Terming the situation as critical, he said despite the fears of renewed flooding the floodgates at the Karkheh dam were opened to ease build-up.
Around 70 villages in the province were evacuated in the past week.
Iraq on Saturday shut Sheeb border crossing to both travellers and trade until further notice.
Energy companies in the oil-rich region are aiding the relief effort by using pumps to remove water.
Heavy rains in Iran began on March 19, affecting around 1,900 cities, towns and villages. Several roads, bridges and buildings have been destroyed. Around 86,000 people are living in emergency shelters. Of this, 1,000 were airlifted to safety.
According to reports, aid agencies are struggling to cope with the scale of the crisis and Iran's budget is under pressure due to US sanctions on energy and banking.
Foreign Minister Javad Zarif said sanctions, reimposed after US President Donald Trump withdrew from the Iran nuclear deal last year, were hindering aid efforts and had caused shortage of rescue helicopters.
The head of Iran's elite Revolutionary Guards said the armed forces were "using all their power" to minimise damage.
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