China has upgraded the alert level for rainstorms to the second highest level.
Heavy rain is forecast to batter Beijing, Tianjin, as well as parts of Hebei, Shanxi and Shandong provinces.
Officials warned that continuous rainfall may cause floods in 14 small and medium-sized rivers.
Working teams from central authorities have arrived in Shanxi, Hebei and Beijing to offer help.
The Chinese capital Beijing is poised for the strongest rainfall this year.
Municipal authorities have issued yellow warnings for both rainstorms and gale.
This rain will continue for a long period.
It will be very heavy, will also have strong wind, thunder and lightning.
In mountainous area, there may also be hail.
The accumulated rainfall is forecast to reach up to 100 millimeters on average between Sunday and Tuesday.
The western and northern areas of the city are expected to see heavier rainfalls.