It's hoped thunderstorms will bring a brief respite to scorched grasslands across the capital after fires raged over the weekend amid the heatwave.
After weeks of no rain, the Met Office has issued a thunderstorm warning for the UK on Monday, Tuesday and Wednesday.
It comes as sweet relief after fires blackened "tinder dry" grasslands in Enfield, with blazes erupting on Rammey Marsh on Saturday and Turkey Street on Sunday.
Hundreds of firefighters worked to douse flames that threatened a school, nearby roads and animals.
The grass fires were just two of hundreds that London Fire Brigade has responded to in the first two weeks of August.
The Brigade has responded to eight times as many grass and open land fires in the first week of August compared to the same week last year.
It's prompted a warning for Londoners to help prevent grass fires by not barbecuing in parks and disposing of cigarettes properly.
The fire in fields surrounding a school in #Enfield is now under control. The blaze spread to a field with two horses who were moved to safety. Thankfully no buildings were affected. https://t.co/lkYm95zSsP pic.twitter.com/do7gbiMMlo
Meanwhile runners struggled in the heat, with four being taken to hospital after collapsing during a half marathon event in Richmond Park on Sunday.
A search is continuing for a swimmer who got into difficulty in the Thames near Hampton Court bridge on Sunday afternoon.
The Met Office has issued a thunderstorm warning from 10am on Monday.
"Hit-and-miss thunderstorms likely to develop through Monday, producing some torrential downpours for some spots, and possible disruption," it warned.
Britons can expect sudden flooding which could cause road closures, travel delays, and possibly power cuts.
"There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds," the Met Office said.
Temperatures are forecast to drop to 28C on Monday in London, 25C on Tuesday and 23C on Wednesday.
England needs "weeks of rain" to stop the drought which is impacting multiple parts of the country experts have warned.
Eight areas in the UK have been placed in drought conditions: Devon and Cornwall, Solent and South Downs, Kent and south London, Hertfordshire and north London, East Anglia, Thames, Lincolnshire and Northamptonshire, and the east Midlands.
Register now for one of the Evening Standard's newsletters. From a daily news briefing to Homes & Property insights, plus lifestyle, going out, offers and more. For the best stories in your inbox, click here.