He says an emergency has been declared at all local hospitals in Khyber Pakhtunkhwa province, where Peshawar is the capital.
Commissioner Munir Azam says the rain started Sunday afternoon and has caused heavy damage to infrastructure.
Azam says flights at the Peshawar airport have been suspended because more rain is expected overnight.
The Pakistani army says troops have been sent to the area to launch rescue and relief operations.
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