A heat-health warning has been activated for the South East region, encompassing Sussex, as temperatures are forecast to climb once more.
Supporters who remain outdoors to catch England facing Mexico in the early hours can expect conditions in the mid to high teens.
Meanwhile, a formal heatwave declaration could be made for portions of the South East on Monday, with mercury levels potentially hitting 31C, according to the Met Office.
In Sussex, temperatures appear set to stay in the high 20s until later in the week when projections indicate figures in the early 30s.
A seven-day caution from health authorities took effect on Saturday across sections of the UK, warning that the anticipated high temperatures over the coming days could pose an elevated threat to life for susceptible individuals.
The Met Office indicated temperatures will hover near the low 30s the following week before reaching a maximum of 34C on Thursday in the South East.
A lengthy period of hot conditions is anticipated across parts of the UK, though it will not prove as intense or muggy as the heat event experienced last month, the weather service noted.
Yellow heat health alerts have been published by the UK Health Security Agency, spanning the East Midlands, eastern region, south-eastern and south-western areas of England plus the West Midlands, from noon on Saturday through 8pm on July 11.
The organisation stated that within the warning zone, modest consequences were probable for health and care services due to the elevated temperatures, encompassing heightened demand for medical services among vulnerable populations and increased mortality risk for those same groups.
It also cautioned about a possible rise in water-related occurrences, encompassing dangers from sudden cold water immersion and drowning.
Met Office meteorologist Becky Mitchell stated that the forthcoming night should feel fairly warm across much of England, with temperatures in the mid to high teens.
She explained that at 1am in the South East of England temperatures would still be approximately 16 or 17C, while further north figures would be around 14 or 15C, making it unusually warm for nighttime hours.
She noted it should prove quite pleasant for returning home on foot after the fixture. Conditions appear largely dry across much of England tonight.
She added that Thursday is currently forecast as the peak at 34C, before a gradual decline sets in, though sections of the south will still experience temperatures in the low 30s by the end of the following week.
Simultaneously, Southern Water has enacted a hosepipe prohibition from 12.01am on July 10 affecting Hampshire and the Isle of Wight.
South East Water’s temporary hosepipe restriction for Kent residents commenced on Friday.
The UKHSA’s fresh alert follows intense heat last week, during which the Met Office issued an uncommon red warning for severe heat for certain areas and the UKHSA activated red heat health alerts.
The UK recorded a provisional June temperature record of 37.7C at Lingwood in Norfolk, according to the Met Office.
This surpasses the prior June record for the UK of 35.6C from 1976 by over 2C.
Such records have historically been broken by only minimal margins.