Beijing lifted a severe weather alert on Tuesday but warned residents to stay vigilant against natural disasters after authorities evacuated more than 82,000 people over fears of more deadly floods in the capital.

The municipal weather office had imposed a red rainstorm warning – the highest in a four-tier system – on Monday, forecasting heavy downpours until Tuesday morning.

The office lifted the alert early Tuesday morning, saying in a social media statement the weather system had weakened as it drifted eastwards.

But it continued to warn of isolated downpours across outlying parts of the city, adding that people "must not let up after strong rains have passed" as landslides or other disasters may follow.

Authorities evacuated over 82,000 people at risk from heavy rainfall as of Monday evening, Xinhua News Agency said, citing the city's flood control headquarters.

Officials warned of flooding risks in the northeastern suburb of Miyun – the hardest hit by the recent deluge – as well as southwestern Fangshan, western Mentougou and northern Huairou.

Last week, floods in Beijing's northern suburbs killed at least 44 people and left nine missing, according to official figures.

Some 31 fatalities occurred at an elderly care centre in Miyun.

At a meeting on Monday, the municipal government stressed the need to "restore the normal order of life and production in post-disaster areas as quickly as possible".

Urgent tasks included road repairs, electricity and water resumption and the refurbishment of schools, hospitals and elderly care homes, officials said, according to a statement on a city social media account. (AFP)