Ireland is set to bake on the hottest day of the year so far with temperatures so high people are being urged to take extra precautions against sunburn and sunstroke.
All parts of Connacht have been issued with a weather warning with the mercury expected to top 29C in places.
Yesterday Newport, Co Mayo, was the warmest spot in the country at a sweltering 27.1C.
The first long hot spell of the year prompted Met Eireann to issue a moderate alert, or yellow warning, as temperatures rocket - anything over 28C degrees requires an alert.
People are being urged to limit their exposure to the sun, with the hours between noon and 6pm the most dangerous.
Connacht will enjoy the highest temperatures and longest hours of sun but parts of the midlands and west Leinster will also be exposed to the conditions.
T he only areas not expected to enjoy the conditions are on the north and north-west coast with mist and fog keeping the sun at bay.
Age Action added its concerns and called on people to check on older neighbours, especially those living alone.
"While the warm weather is welcome, it can pose difficulties for older people, especially those with respiratory and heart problems," spokesman Eamon Timmins said.
"Certain medications can also reduce people's tolerance of heat."
Mr Timmins added: "We are not used to high temperatures in Ireland, but people should be aware that heatwaves in other countries have resulted in increased deaths among older people. Everyone can play their part to ensure that everyone remains well during the current warm spell."
The heatwave is forecast to run until the weekend thanks to a large swathe of high pressure.
Temperatures will drop back to more average summer conditions on Saturday and Sunday then more unsettled weather is expected to move in over the country early next week.