WASHINGTON (AP) -- A new scientific report warns that global warming is causing more extreme storms and droughts and that the world should prepare for an unprecedented onslaught of deadly and costly disasters.

The report says the greatest danger is in highly populated, poor regions of the world, but no region is immune. The document by a Nobel Prize-winning panel of climate scientists forecasts stronger tropical cyclones and more frequent heat waves, deluges and droughts. The 594-page report released Wednesday blames a combination of man-made climate change, population shifts and poverty.

The scientists say that some places, particularly parts of Mumbai in India, could become uninhabitable from floods, storms and rising seas. Other cities at lesser risk include Miami, Shanghai, Bangkok, China's Guangzhou, Vietnam's Ho Chi Minh City and India's Kolkata.