It beats the previous record from 2006.
Dublin has recorded its all time highest temperature, right now it's 33 degrees in the Phoenix Park.
That beats the previous record of 31 degrees, recorded in July 2006 in Casement.
Nationwide, it's Ireland's second highest temperature on record.
Met Éireann has said the mini heatwave will end tonight, with temperatures dipping back down again this week.
A yellow warning will last until midnight but Leinster will remain under the alert until tomorrow evening.
Darren O'Connor, from Dublin Fire Brigade, says even with cooler conditions, the risk of wildfires remains extremely high:

Coimisiún Na Meán In Contact With Tik Tok Following Social Media Posts Of Dangerous Driving
Staff At Oberstown Children Detention Campus Continue Protests Over Safety Issues And Resourcing
Social Media Could Change Forever If Meta Loses US Legal Battle, Says Experts
GRA Welcomes Announcement Of Pursuit Training For Garda Members Following M9 Crash In Moone
Unions Say Teachers Are Overwhelmed With Paperwork
Nationwide Reaction Following Kildare M9 Collision That Resulted In Five Deaths And Four Being Hospitalised
Two Teenagers To Stand Trial For Murder Charges That Allegedly Took Place In Blanchardstown Earlier This Year
ETBI Says Almost 300 Primary Schools Should Consider Change To Multi-Denominational Patronage