Cooler temperatures today may prevent Ireland from reaching the threshold for a heatwave to be declared, but warm conditions will continue into the weekend Met Éireann has said.
A heatwave is declared when there are five days or longer of temperatures of 25C or more in the same location.
Temperatures were due to rise as high as 27C in parts of the country yesterday, while Oak Park Weather Station in Co Carlow recorded a high of 28.1C on Tuesday.
Met Éireann forecaster Aoife Kealy said yesterday that while a heatwave was possible, cooler temperatures today may prevent Ireland reaching the point where a heatwave can be declared, with the south and southeast expected to enjoy the best of the heat with highs of up to 25C.
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It has forecast a cloudy start today, with scattered showers, some of them heavy. The showers will become increasingly confined to the midlands, north and east this afternoon and it will tend to brighten up with longer sunny breaks developing as the day goes on.
Met Éireann said it will continue mild and humid with highest temperatures of 19C to 25C.
Separately, a Yellow thunderstorm warning will be in effect until 10pm for counties Antrim, Armagh, Down, Fermanagh, Tyrone, Derry.
The Met Office says whilst some places will remain dry, heavy showers and thunderstorms could cause disruption.
Warm conditions will continue tomorrow and into the weekend, with the mercury hovering around the mid-20s mark.
As for the possibility of a high temperature warning being issued, Ms Kealy said current forecasts deem it unlikely that one will be issued by Met Éireann.
For a high temperature warning to be issued, temperatures must surpass 27C and cover a widespread area.
