The Met Office has issued a 36-hour red weather warning covering 50 areas across the UK, with temperatures expected to soar above 30°C through Saturday. In London, highs of 34°C on Thursday, 37°C on Friday, and 32°C on Saturday are forecast, before cooling to 26°C on Sunday. Leeds will see 31°C on Wednesday, 33°C by Friday, then easing to 29°C on Saturday and 23°C on Sunday.
Digital Landline Switch and Power Cut Risks
Experts warn that prolonged extreme heat can heighten the risk of infrastructure disruption, making it essential for vulnerable people to understand how their phone service would function during a power cut. Millions of households are being migrated from conventional landlines to internet-based digital voice services as part of the UK's nationwide telephone network overhaul. Unlike traditional landlines, which drew power directly from the telephone network, digital phone services depend on broadband equipment and mains electricity. If power is lost, phone services could be affected unless alternative arrangements are in place.
More than three million UK households have already been moved to digital landline services, with the nationwide switch set to be finished by January 2027. The matter is especially worrying for older adults, people living alone, and vulnerable residents who rely on their home phone to contact family, carers, or emergency services. Recent government figures suggest around two million vulnerable people across the UK depend on telecare alarms and related services that historically used traditional landline connections.
Expert Advice for Families
Bryn Thompson, Director at digital voice provider Phonely, said: "Many people still assume their home phone will continue working during a power cut because that's how landlines operated for generations. But millions of households have already been switched to digital phone services, and many families don't realise there can be important differences during an outage." He added: "The current heatwave and Met Office warnings should act as a reminder for families to check how elderly relatives would stay connected if the power goes out."
Thompson continued: "For older people who depend on a landline as their primary way of staying in touch, a prolonged power cut could become a serious concern if they haven't prepared in advance." The UK's analogue Public Switched Telephone Network (PSTN) is being phased out and replaced with modern digital technology, meaning millions of households will transition to digital voice services over the coming months. Although providers have put safeguards in place for vulnerable customers, awareness of the switchover among consumers remains worryingly low.
Thompson added: "Most households won't experience any problems, but families should take a few minutes to understand how elderly relatives would stay connected during an emergency. Many people don't realise there are simple steps that can reduce the risk of being cut off during a power outage, whether that's having a battery backup, keeping a mobile phone charged, or understanding what support is available from their provider."
He concluded: "For many older people, a home phone is far more than a convenience. It's often their main connection to family, carers and emergency support. A simple conversation now could make all the difference if there's an unexpected power outage in the future."
