In the east and northwest of China, temperatures as high as 43.9 degree Celsius (111.02 Fahrenheit) have scorched Zhejiang, Jiangsu, Shanghai, Anhui, Xinjiang in recent days, state broadcaster CCTV said.
China Meteorological Administration said some localities in Xinjiang's Turpan Basin, southern Anhui, and central and western Zhejiang, temperatures could rise above 40C.
The observatory of Zhejiang's capital Hangzhou recorded a 41.9C historical high on Saturday, with 40-42C temperatures forecast till Monday.
Jiangsu's observatory issued a red warning for heat on Sunday after high temperatures which had persisted for more than a week further intensified.
The national weather forecaster on Monday cautioned of potential fire hazards caused by excessive power consumption and excessive electrical loads.
Organizations:
CCTV, China Meteorological Administration, Grid
Locations:
Nanjing, China, Jiangsu, Zhejiang, Shanghai, Anhui, Xinjiang, Turpan, Hangzhou, Wuxi, Changzhou