A high temperature weather warning has been issued for County Clare.
The Met Eireann yellow weather warning, which is set to come into effect from lunchtime tomorrow, also impacts Galway, Mayo, Cork, Kerry and Limerick.
According to Met Eireann, temperatures are expected in excess of 27 degrees Celsius, during Thursday afternoon.
The yellow weather warning is valid from 1pm on Thursday, June 27 until 7pm on Thursday, June 27.
A small craft warning has also been issued by Met Eireann, with northeast winds set to reach force six on Irish coasts this week, impacting Hook Head to Loop Head to Rossan Point.
An environmental warning also states that the warm and humid conditions this week will be conducive for the spread of potato blight.
The hot weather warning comes nearly a year to the day when a temperature of 32 degrees was recorded at Shannon Airport on June 28, the highest temperature since records began at the Clare-based international airport.