The United Nations issued a flash appeal on Tuesday for $160 million to help Pakistan cope with catastrophic floods that have killed more than 1,100 people, destroyed infrastructure and crops, and affected 33 million people. 

"Pakistan is awash in suffering," UN Secretary General Antonio Guterres said in a video message for the launch of the appeal in Islamabad and Geneva.

"The Pakistani people are facing a monsoon on steroids – the relentless impact of epochal levels of rain and flooding."

He said the scale of needs, with millions of people forced from their homes, schools and health facilities destroyed and livelihoods shattered by the climate catastrophe, required the world's collective and prioritized attention.

Meanwhile, the U.S. embassy in Islamabad Tuesday announced an additional $30 million in life-saving humanitarian assistance to support people and communities affected by the floods in Pakistan.