Seyyed Hashem arrived in Ahvaz at the head of a delegation late on Monday to visit the regions as well as relief aid supply in these sites.
Commenting on reasons behind his trip to Khuzestan province, he said that he was there to examine depth of the incident.
'No doubt, we will stand alongside Iran in the face of the big catastrophe,' he said.
Heavy rain started falling in mid-March destroying lives, washing away homes and farmlands, damaging power, water and gas infrastructure in 24 provinces.
Tens of thousands of people lost their homes and businesses mainly in the north and southern regions in Golestan, Mazandaran and Khuzestan provinces.
The death toll as of April 12 was 77 people and thousands have been injured.