Some 30 firefighters are tackling a huge wildlife blaze believed to have destroyed thousands of pounds of crops.
Images show flames tear and smoke billow across countryside near St David's, west Wales, following the outbreak of the blaze at around 1.30pm.
Peter Gillibrand, a journalist who witnessed the blaze start, has tweeted: "A huge wildfire has started in St David’s. Thousands of pounds of crop being destroyed as I film. Residents say they’ve never seen anything like it before - a result of our changing climate?
"Luckily, Fire Service are dealing with it but it seems to be spreading faster."
It's believed the fire has destroyed around five fields of corn, Wales Online reports.
In a further tweet, Mr Gillibrand said: "Farmers say they’ve lost their whole crop here and it’s moving towards St David’s city.
"It was a very hard thing to watch. Talking to the landowners, they are gutted. Didn’t have much time to speak, which is understandable.
"People, including myself, asked whether we could help in any way… and local bar owners giving out drinks to the brave firefighters."
People have been asked to avoid St David's, it is reported. Multiple roads in and around the city have been closed.
Traffic is particularly busy on the A487 in both directions in the north of the city as a result.
Bar staff have been giving firefighters drinks to help in the heat.
Another local tweeted: "Ash falling everywhere."
It is believed the blaze started on the north side of the valley but a brisk northerly wind has caused it to spread rapidly across adjacent fields.
It comes after a series of wildfire across the country lately, largely due to the hot weather.
A massive blaze tore through a precious nature reserve near the millionaire's resort of Sandbanks, Dorset, with motorists and day-trippers evacuated yesterday.
Around 70 firefighters battled the flames after the fire started close to known nudist beach Knoll Beach. It spread through the tinder dry heath on Dorset's Studland peninsula.
The chain ferry which carries tourists to Studland was suspended as the fire - which could be seen on the other side of Poole Harbour - continued to rage for hours.
