UN Secretary-General Antonio Guterres has made a global appeal for assistance to Pakistan, which is reeling from devastating floods.
Since mid-June, various regions of Pakistan have seen rainfall much heavier than average years. The downpours have caused floods in many regions.
The Pakistani government says about one-third of land has been inundated, killing 1,396 people and affecting nearly 33 million others.
Government estimates of the damage inflicted on the country's economy and agriculture have reached more than 30 billion dollars.
On Saturday, the second day of his visit to Pakistan, Guterres visited the badly ravaged southern province of Sindh with Prime Minister Shehbaz Sharif and other officials.
After listening to local authorities explain the impact of the disaster, Guterres said, "It's difficult not to feel deeply moved when we hear such detailed descriptions of tragedy."
The UN chief attributed the disaster to climate change. He called for more efforts to mitigate global warming, and called for assistance to Pakistan.