Commuters across the capital should brace themselves this morning, as heavy rain is set to batter London during the rush hour on Wednesday, 7 October.
What began as light showers in the early hours will turn heavier and far more persistent through the morning, with the worst of the downpour landing squarely on the peak commute. Anyone heading into work, school or the shops should expect a thoroughly miserable journey.
Forecasters at the Met Office say the chance of rain will stand at around 60% by 5am, climbing to 70% by 7am as the working day gets under way. From about 8am the rain is expected to turn properly heavy, and by 9am there will be a 90% chance of rain across the capital. Between 10am and midday the probability stays at 95% or higher, meaning the vast majority of Londoners will be caught in driving rain.
Temperatures will sit at around 15C through the morning, nudging up to a high of 16C later in the day — cool, raw and unmistakably autumnal. It is a sharp comedown from the 21C autumn sunshine London basked in earlier this month, and follows the capital bracing for its first single-digit night of the season.
Allow plenty of extra time for the journey
The timing could hardly be worse for the morning rush. Roads will be slick, visibility poor and standing water likely on low-lying routes, so drivers should slow right down, double the gap to the vehicle in front, and be ready for sudden spray from lorries and buses. Aquaplaning is a real risk where water pools on fast roads such as the North Circular and the A13.
Cyclists and motorcyclists face a particularly unpleasant ride. Wet leaves on the road surface can be as treacherous as black ice, while drain covers, manhole lids and painted road markings lose much of their grip in the wet. High-visibility clothing and bright front and rear lights are essential in the gloom, and braking distances will be far longer than usual.
Those relying on public transport should check the TfL website or app before setting out and allow significantly more time than normal. Heavy rain can trigger signal failures on Tube lines with open-air sections, speed restrictions on National Rail services and flooding at station entrances — any of which can add long delays to the morning run. Bus routes are likely to be slowed as the roads clog up.
Road users already have enough on their plates. In Sutton, drivers are facing a week of disruption as two roads close for major works, while South Wimbledon has seen Kingston Road shut westbound after a burst water main flooded the area — a reminder of how quickly the capital’s streets can become impassable when water gets the better of them.
Flood-risk areas to watch
A morning of prolonged heavy rain raises the risk of localised flooding, especially on roads beside the Thames, in underpasses and on stretches where drains struggle to cope with sudden deluges. Pedestrians should avoid walking through floodwater — just 15cm of fast-flowing water can be enough to knock an adult off their feet, and lifted manhole covers can turn a flooded pavement into a hidden hazard.
Motorists are urged never to attempt to drive through flooded stretches of road. As little as 30cm of moving water can float a car, and vehicles that stall in floodwater frequently face an expensive recovery bill. If the road ahead looks submerged, turn around and find another route.
People living in basement flats should keep an eye on lightwells and make sure gutters and street drains near their homes are clear of fallen leaves. Elderly and vulnerable residents who need to go out are advised to take extra care on slippery pavements and to carry a fully charged phone in case of delays.
When will the rain clear?
There is better news for the journey home. The heaviest rain is expected to persist through the morning and into the early afternoon, but by 5pm the chance of rain drops back to around 50%, and by 6pm the worst should have largely cleared the capital.
And tomorrow looks far kinder. Thursday is forecast to be much drier, with sunny spells through the day and only a very small chance of rain — a welcome break for a city that will have taken a proper soaking. After that, Londoners can start drying out their umbrellas and looking forward to a calmer end to the week.
