A weather station in Newport in south Wales has set a new hottest temperature record for Wales in July, the Met Office has confirmed.
Enjoying the weather on the beach at Langland Bay near Swansea
The record of 34.2C (93.5F) at Penhow on Wednesday surpassed that set at RAF Mona, Anglesey earlier in the day.
But the heatwave has kept the emergency services and councils in Wales busy.
Two barns spontaneously combusted in north east Wales and Swansea council warned teenagers against cooling off in the city's marina.
The council said it would be taking "firm action" against teenagers jumping into the marina in the heat.
The new temperature record at Penhow surpassed the 33.9C (93F) set at RAF Mona, Anglesey, earlier on Wednesday.
This temperature was a third of a degree higher than the previous high, recorded in Usk for 30 years.
The Penhow weather station, near Newport, is one of 37 around Wales where readings are recorded.
The new record was verified on Thursday.
Met Office spokesman Barry Gromett, said: "We have a number of stations that report in real time and a whole lot more which report every 12 hours or every 24 hours.
"Penhow is one which reports every 24 hours. It more or less ties in with results we had from the Bristol area on Wednesday.
Usk held Wales' July temperature record for 30 years
"Penhow has swiped it back for the south. I was talking to a guy yesterday and he was most miffed that the record had gone northwards."
Meanwhile, north Wales firefighters were called to tackle two barns which spontaneously combusted in the heat on Wednesday.
Farms in Dolwen, near Colwyn Bay, and Tremeirchion, near St Asaph, lost valuable straw and hay bales in the fires.
Ysbyty Gwynedd in Bangor said there had been an increase this week in the number of elderly people being treated in their accident and emergency unit for heat-related illnesses.
Nine elderly patients were treated on Wednesday although a hospital spokesperson said the cases of sunburn were low - the numbers being higher over the weekend.
In Rhyl, the inshore lifeboat crew attended 11 call-outs in 48 hours to reports of inflatable airbeds being blown out to sea, and of people being trapped by the incoming tide.
In south Wales, Swansea council warned of the risks of teenagers cooling off in the city's marina.
The council's anti-social behavioural teams will visit the homes of individuals caught in the waters to warn them of the dangers of hidden debris and passing boats.
Those who persist could face legal action.
Nicci Southard from Safer Swansea said there was a bylaw against swimming in the marina for a reason and the level of action was to ensure the law was upheld.
"It is not a safe swimming area and anyone caught swimming there is putting their health and lives at risk," she said.
"If they continue to disobey the law we will have no choice but to take legal action against the persons concerned."