Travellers to northern and eastern China are set to face massive disruptions in air and road traffic as the country on Tuesday issued a red alert for severe fog.
The red alert – the highest level in China’s three-tier system of yellow, orange and red warnings for fog – means visibility may fall below 50 metres within two hours.
A large part of Beijing, Tianjin and Hebei would be shrouded in thick fog from Tuesday to Wednesday, the national observatory said. Other provinces including Henan, Shandong, Anhui and Jiangsu would also be affected.
Airports in those regions are bracing to suspend flights and highways might also be closed.
The observatory warned drivers in affected regions to slow down and airports, highways and ports to take necessary safety measures.