The release of the official report, now in its third edition, came shortly before the UN Conference of Parties (COP21) summit, which began on Monday with the aim of striking a global deal limiting dangerous climate change.
China is the world's second biggest economy but also its largest polluter, estimated to have released between nine and 10 billion tonnes of carbon dioxide in 2013.
Beijing pledged last year to peak carbon dioxide output by "around 2030" -- suggesting at least another decade of growing emissions.
Temperatures are rising at the rate of 1.5 degrees Celsius every 100 years and could jump a further 1.3 to 5.0 degrees Celsius by the end of the century, said the China Climate Change website, which operates under the state planner.
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The New York Times said the report, which was compiled under the authority of the Ministry of Science and Technology, spells out "sombre scenarios" including threats to infrastructure from increased rainfall and melting permafrost, among the possible fallout from climate change.
"Some cities may even face risks of massive disasters that are hard to forecast."
The report, called "The Third National Climate Change Assessment Report", cites projections that the sea off eastern China could rise between 40 to 60 centimetres by the end of the century compared to 20th century averages, the newspaper said.
A separate study by US-based research group Climate Central predicted that China would be the country hit hardest by rising sea levels if global temperatures rose by four degrees Celsius.