It Malthouse will chair a Cobra civil emergency committee to discuss the approaching heat wave, a government spokesman has said.
It will be the second Cobra meeting Mr Malthouse will lead on this issue.
London Mayor Sadiq Khan has also urged the public to travel alone when necessary, and issued an air pollution alert on Monday.
On Friday, Mr Khan convened a special meeting of the Mayors Advisory Group with key senior officials from agencies including the NHS, the Met Police, London Fire Brigade, London Ambulance Service, London Councils and Transport for London – to ensure that the London agencies have a robust plan to address the level four heat warning.
He added: “I must make it clear to all Londoners that the coming days will see temperatures that we have never experienced in this city.
“This hot weather is normally something we all welcome, but this heat wave poses a potential threat to life and means we will all have to change our routines to stay safe. It is vital that we all take sensible precautions to take care of ourselves and reduce the pressure on our emergency services, who will be very busy in this extreme heat.
“Londoners need to be careful on Monday and Tuesday. This only includes using public transport if your journey is absolutely necessary – and if you do, plan ahead, take water with you and be prepared for significant delays, particularly on the London Underground which runs with speed limits.
“On Mondays and Tuesdays, Londoners who do not have to travel to work should work where they feel most comfortable. For many, this means staying at home, while others may prefer to move to office spaces that are cooler and air conditioned.
“Remember that these temperatures are a danger to all Londoners, no matter how fit and healthy they are. I also call on Londoners to continue to watch out for the most vulnerable, including the elderly, single people and those with chronic or serious illnesses.”
The current heat wave will peak on Tuesday, with an 80% chance of the mercury surpassing the UK’s record temperature of 38.7C (101.7F). Cambridge in 2019.
Transport for London (TfL) advises passengers to travel only for ‘essential travel’.
The company’s chief operating officer, Andy Lord, said: “Due to the exceptionally warm weather expected next week, customers should only use London’s transport network for essential journeys.
UK Weather: Summer Heat Wave 2022
“If customers do need to travel, they should check before they travel as we expect there will be some impact on metro and train services due to temporary speed limits that we need to put in place to keep everyone safe,” he added. up.
“It’s also vital that customers always have water with them when they travel.”
The With Office has issued an orange warning for heat affecting much of the England and Wales from Sunday to Tuesday.
There is a 50% chance that temperatures will reach 40C somewhere in the UK, likely along the A1 corridor, with the Met Office also issuing its first red warning of extreme heat.
Very high temperatures could affect rails, overhead power lines and signaling equipment, with TfL saying it will do everything it can to keep as many services running as possible using “enhanced” inspections to mitigate the impact of the extreme weather.
Track temperature checks will be performed regularly on the pipe and rail network to ensure they remain safe and that the track is not at risk of bending or kinking, TfL said in a statement.
It added that it also inspected the air conditioning units on the trains that cover 40% of the Tube network, the trains on the Elizabeth Line and London Overground, as well as the air cooling units on double-decker buses to ensure they are functioning properly.
TfL also has response teams standing by on its rail and road network to resolve any issues, with a particular focus on train jams and times, crowds and customer advice.