Britain is gearing up for yet another surge in heat this weekend, marking the country's third heat wave of the year. After a brief period of cooler weather, temperatures are set to rise significantly, although they may not reach the extreme levels seen earlier this summer. According to Jason Kelly, a chief meteorologist at the UK's Met Office, parts of England and Wales could see temperatures soar to 31 degrees Celsius (around 88 degrees Fahrenheit) on Thursday, and 32 degrees Celsius (nearly 90 degrees Fahrenheit) on Friday.

The Met Office defines an official heat wave as three consecutive days of temperatures meeting or exceeding a specific threshold. In northern areas, including Scotland and Northern Ireland, the threshold stands at 25 degrees Celsius (77 degrees Fahrenheit), while in London and its surrounding counties, it is at 28 degrees Celsius (82.4 degrees Fahrenheit). The Met Office anticipates that most of England, along with eastern Scotland and eastern Northern Ireland, will soon meet these criteria, with regions not reaching their thresholds expected to still experience above-average temperatures.

To ensure public health and safety, the U.K. Health Security Agency has issued yellow heat health alerts, which represent the lowest warning level, for all counties in England until Tuesday. The agency cautions that these heat conditions may lead to severe impacts on health and social care services, increasing risk factors particularly for older adults and other vulnerable groups across the nation.