A status orange high temperature warning is in place for 6 counties.
So those are Cavan, Monaghan, south Leitrim, Roscommon, Longford and Westmeath.
The warning will be in place from 2pm today.
While the rest of the country will be under a status yellow alert.
It will run until Friday.
Met Éireann is forecasting daytime highs of 30 degrees.
While at night it isn't expected to fall below 17 degrees.
The mercury could reach as high as 31 degrees in places tomorrow.
Alan O'Reilly from Carlow Weather says we aren't used to this:
"Some footpaths are starting I suppose to slip and expand."
"We aren't used to this kind of heat."
"But we've seen it on occasion, but we haven't seen it often."
"It can begin to impact then, in terms of local impact."
"I mean we've seen 30, 31, 32 before but it's really not something we're used to."
Latest forecast of temperatures for 4pm tomorrow from Met Éireann HARMONIE model shows 30c possible in a few areas and possibly up to 32c. The all time record for July is 32.3c from 2006 and it was recorded at Elphin in Roscommon. pic.twitter.com/9yc2UUneA6
— Carlow Weather (@CarlowWeather) July 20, 2021
HSE Advice To Avoid Heat Stroke
The HSE has issued advice to help prevent heat exhaustion and heat stroke.
- Make sure your heating is turned off
- Stay out of the sun from 11am to 3pm
- Stay hydrated
- Keep your drinks in the fridge
Babies and children, people over 65, and people with underlying conditions are most vulnerable.
People are advised to seek medical help if they experience any signs of dehydration such as dizziness, drowsiness, or a racing heart.