In some provinces, authorities are predicting levels to rise to at least 40 C and the national government has warned that forest fires could occur, reports BBC.

Mercury levels will start spiking on Saturday - "Big Heat" day in the traditional Chinese calendar, the British media reported.

Authorities have issued  red alerts, which is the highest warning, for  Zhejiang region.

The region experiences temperatures in the 20s inJuly.

However, local authorities believe it may touch 40 in the upcoming days.

To deal with the hot spells many in China turn to air conditioning in their homes, offices and factories however it could cause trouble for the national power grid, reports BBC.

Demand could reach a new high over the summer and the Ministry of Emergency Management has warned that safe operations would face "severe tests".