Met Éireann has issued a Status Yellow high temperature warning.
It said a number of counties can expect maximum temperatures in excess of 27° combined with overnight temperature minimums in excess of 15°.
The warning is in place from 1:00p.m on Friday (July 10) until 7:00a.m on Sunday (July 12).
Affected counties are: Carlow; Kildare; Kilkenny; Laois; Limerick; Longford; Meath; Offaly; Tipperary; Waterford; Westmeath; and Wexford.
Met Éireann said potential impacts include:
The Department of Agriculture, Food and the Marine (DAFM) has this week issued a 'Condition Orange' warning, indicating a high fire risk.
The warning came into effect at midday on Wednesday (July 8) and will remain in place until 12:00p.m on Monday (July 13).
The department said that due to current weather patterns and high temperatures, a high fire risk is deemed to exist in all areas where hazardous fuels such as dead grasses and shrub fuels such as heather and gorse exist.
"Current dry conditions are forecast to largely remain in place throughout the span of this notice with high temperature phases forecast within this period.
"Elevated fire risks are expected in all areas during this period but will be especially focussed on southern and eastern regions," DAFM added.