A woman rides an electric bike in Shanghai on June 26, 2018.

A woman shields herself from the sun in Shanghai on June 26, 2018.

A woman is well protected when riding an electric bike in Shanghai on June 26, 2018.

Shanghai weather bureau issued this years’ first orange alert for heat, forecasting the mercury would hit 37 degrees Celcius on Tuesday.

The heat alert was issued at 9:43am. Affected by subtropical high, the temperature is climbing quickly, the meteorological bureau said.

The highest temperature in downtown area, Baoshan, Jiading, Minhang, Qingpu, Songjiang and the northern part of Pudong will exceed 37 degrees while the rest of the city will see a highest temperature of 35 degrees.

A woman walks across a road in Shanghai on June 26, 2018.

A man shields himself from the sun with his hand in Shanghai on June 26, 2018.