Most of England and Wales face a “very high” risk of wildfires as the country grapples with its third heatwave of the year, authorities have warned.Data from Natural England shows that areas in the South West, London, eastern England and Wales face the most risk, with wildfires reported throughout the country. Only the Isle of Wight faces “exceptional” risk – the highest level. It is also one of the areas currently affected by a hosepipe ban.Fire and rescue services were fighting 19 separate wildfires as of Monday afternoon, the National Fire Chiefs Council (NFCC) said.A major incident was declared in Derbyshire on Monday as firefighters work to contain a wildfire on Tintwistle Moor in Glossop that has continued for three weeks.It comes after a major incident was declared in North Wales on Sunday due to a wildfire near Sychnant Pass on Conwy Mountain. The status was lifted late on Monday, with residents able to return.Lisa Goodier, the mayor of Penmaenmawr Town Council, said around 60 people were forced to evacuate their homes early on Sunday.Natural England's fire severity index map for Tuesday (Natural England)She said: “The biggest shock was the police knocking on people's doors at 6.30am and asking residents to grab a bag and leave now.”​She told The Independent that the fire had become larger throughout the day and created thick smoke that filled people’s homes. ​Natural England uses information such as wind speed, temperature, time of year and rainfall to produce a fire severity assessment, with maps showing the risk increasing throughout the week.The Met Office has said the scorching heatwave conditions experienced by much of the UK are due to last into the coming week, with most areas expected to stay dry, sunny and very hot – all of which increase the risk of wildfires. Dave Swallow, National Fire Chiefs Council (NFCC) wildfire deputy lead and lead tactical adviser, warned that such conditions “significantly increase wildfire risk”.“But most wildfires start because something provides the spark,” he added.“Whether it is a disposable barbecue left behind, a discarded cigarette or even a glass bottle left in the sunshine, we all have a role to play in preventing them. Summer should be a time for people to enjoy the outdoors but it’s important not to underestimate the risks. Every year we see devastating wildfires and tragic drownings in inland water.“As more schools break up for the summer holiday, we’re asking people to enjoy the warmer weather safely, look out for one another and take simple steps to help prevent avoidable tragedies.”Around 125 firefighters were called to a blaze in Walthamstow, east London on Sunday, which caused parts of the Overground line to close. On Friday evening, London Fire Brigade dealt with a blaze involving shrubbery at Stratford Station nearby, which also caused rail line closures.East Sussex Fire and Rescue Service was called out to a “large fire in the open” on the South Downs near Eastbourne on Saturday, while teams also tackled a blaze at Devil’s Dyke in South Downs National Park in West Sussex.Heatwaves have hit mainland Europe especially hard in recent months, with hundreds of firefighters battling for days to contain one of Spain’s deadliest wildfires. At least 12 people were killed in the Almeria province in the south of the country as a result of the blaze.Natural England's fire severity index map for Thursday (Natural England)Four of the dead are believed to be British, according to regional authorities.The Met Office has warned of possible thunderstorms from Monday in parts of southern England, but overall another very dry week is expected.Record-breaking temperatures have led to 2026 becoming the first year to record 35C on six separate days. This broke the previous records set in 1976 and 2020 when five days were recorded with temperatures over 35C.This year has also become the first to see temperatures of 35C or higher in three calendar months – and broke the record for most temperatures of 34C or higher, with nine so far this summer.The hot, dry weather has also led water firms to announce hosepipe bans for much of the South and eastern England.