Temperatures will hit 26C in Dublin, Offaly, Cork and Wexford today, according to the Met Éireann.
The provinces of Kildare, Laois and Tipperary will also experience highs of 25°C or 26°C as the heatwave sweeps the country.
The forecaster said some areas could hit 28C today but that heat will be “very local” and the rest of the country will see highs of 23C to 24C.
Temperatures will hit 24C today in Clare, parts of Donegal, Tyrone and Belfast. Temperatures are currently above the average for August.
Meteorologist Paul Downes said the weather warning, which went into effect across the country today, was due to widespread warm temperatures.
Mr Downes said there is quite a shift between daytime and nighttime temperatures but overnight highs will increase in the coming days to make for uncomfortable sleeping conditions.
The forecaster said a heatwave consists of temperatures above 25C in the same spot for five consecutive days.
It added that the effects of this hot weather will be heat stress, particularly for the more vulnerable demographic, a high UV index and the risk of water-related incidents.
Temperatures will hit 25C across the country tomorrow, with a possible high of 28C.
Mr Downes said the Status Yellow heat warning, which goes into effect at 12pm tomorrow, will result in night-time temperatures rising in Leinster and Munster and beyond.
The UV index will also be quite high this week as there will be fewer clouds and more sunshine.
Mr Downes said the forecast as of Sunday was still uncertain – with the risk of thunderstorms but that warm conditions could last into next week.
“But the latest forecast actually holds fairly warm temperatures for the early days of next week as well, possibly 26C or 27C in parts of the East on Monday,” he said.
“More likely in the low to mid twenties on Tuesday and Wednesday, where there is potential for fairly warm temperatures to persist.”
https://www.independent.ie/news/revealed-the-hottest-places-in-ireland-today-as-heatwave-continues-41902734.html Revealed: The hottest places in Ireland today as the heatwave continues