New red heat warning in place but cooler weather on the way

New red heat warning in place but cooler weather on the wayImage source, EPAByElizabeth RizziniLead Weather PresenterPublished7 minutes agoCommentsTemperatures are building quickly again on Friday for parts of the UK after another record-breaking day on Thursday. Many parts of southern England and Wales endured overnight temperatures which widely remained in excess of 20C.A Met Office red warning for extreme heat is in place for parts of south-east and central southern England up to Oxfordshire until 9pm, where temperatures could reach 35-37C (95F to 98.6F).However, Friday will bring respite for some as cooler weather starts to move in from the west although warnings for thunderstorms have been also been issued. Image source, BBC WeatherImage caption, A Met Office red extreme heat warning is in place for some on FridayNational records fell again yesterdayThursday was another record-breaking day across the UK with all four nations seeing their highest temperatures of the year so far. In England Merryfield in Somerset reached 36.7C (98F). This sets a new UK record for the highest June temperature, surpassing the 36.1C set in Gosport, Hampshire, on Wednesday. Wales also set a new June record with by reaching 36.6C in Cardiff. Scotland and Northern Ireland both recorded their highest temperatures of the year so far with 31.2C in Threave and 30C at Castlederg. A June record for minimum temperatures was highly anticipated overnight from Thursday to Friday but despite a 'tropical night' being experienced widely, the 22.7C recorded in Herstmonceux, East Sussex was not enough to beat Wednesday nights temperature of 23.5C in Cardiff.What is a tropical night? A tropical night is defined as when the temperature does not drop below 20C during a 24 hour period between 09:00 and 09:00. In 2025 there were five tropical nights and this has already been equalled this year.The record set in Cardiff on Wednesday exceeded the previous record of 22.7C set back in 1976.Just a fe...