Children in the region were more affected by extreme heat than anywhere else in the world, according to a statement.
Over 1,700 people were killed, and over 33 million were affected by the devastating floods triggered by the erratic monsoon rains last year.
Weeks after floods affected more than 33 million people and killed 1,719, survivors are battling a rising tide of disease while children miss school.
About $816 million is needed for rescue and relief in Pakistan, more than 2,000 people have died from floods and subsequent infections since mid-June.
The Pakistani government had inaugurated an anti-dengue campaign, raising public awareness in response to the alarmingly high cases.
Authorities declared a national emergency as death toll from the months of flooding continues to rise.
