Passengers are being warned of a 24-hour Tube strike from 21:00 GMT.
Rail and Maritime Transport (RMT) union members are walking out in a row about staffing involving Tube drivers.
Transport for London warned that Central, Waterloo and City lines would be affected and other lines were expected to be busier as a result.
Meanwhile, Southern Railway conductors are also set to walk out from Wednesday in a long-running dispute about the role of train guards.
Tube strike: What you need to know
Tuesday 21 February
- The walkout starts from 21:00 and Central line passengers must complete their journey by 23:30
- The Waterloo and City line is not expected to be affected
Wednesday 22 February
- No Waterloo & City services
- No Central line services east of Leytonstone
- From 05:30, no westbound Central line services between White City and Leytonstone
- From 07:00, very limited Central line services. Expect congestion and severe disruption
- The Central line closes at 23:00
Normal services are not expected to resume until Thursday.
Southern said it hoped to run as many trains as possible during the strike on Wednesday.
During the previous conductors’ strike on 23 January, Southern ran about three-quarters of its regular service, the firm said.