The hottest day of the year so far has been recorded in Scotland today.
The country has been experiencing high temperatures for weeks, peaking on Thursday in Dumfries and Galloway, and the hot weather is expected to last until the weekend.
The mercury hit a record 29C in Threave, near Castle Douglas.
However, eastern and central areas woke up submerged in sea fog - or haar -, caused by the warm air passing over the cold North Sea.
The Met Office has also issued amber warnings for extreme heat in Northern Ireland, Wales and the south east of England, appealing to people to watch out for heat exhaustion and sunburn.
READ MORE: 'Toxic' pollution at burn with black water and dead fish under investigation by SEPA
BBC Weather said the heat was triggering a few thunderstorms in Dumfries and Galloway with grey, murky skies in some eastern coastal areas and the Northern Isles.
Forecaster Kirsteen MacDonald said: "High pressure across the UK did not really move all week.
"We also have had a cumulative effect, where each day of strong sunshine warms the air further, on top of the warming by descent.
"This is what has caused the hot weather in parts of the UK over the last few days. Temperatures will peak again tomorrow around 28C, possibly 29C.
"This weekend, high pressure will remain in charge across Scotland. Plenty of warm sunshine in the forecast, but temperatures will be down by quite a few degrees. Eastern coasts will continue to be plagued by haar."
The Met Office launched its new extreme heat warning system at the start of June, with amber being the second-highest level in the system.
READ MORE: Councils under pressure due to staff shortages as bin collection is suspended
Heatwaves are becoming more frequent due to human-induced climate change.
The world has already warmed by about 1.2C since the industrial era began, and temperatures are predicted to keep rising unless governments around the world make steep cuts to greenhouse emissions.
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here