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:

Gardaí Travel to Jordan After Arrest in Jamey Carney Case
“You Don't Use A Sledgehammer To Crack A Walnut": Kildare Solicitor Criticises New Legal Aid Scheme As Work Stoppage Continues In Dublin
Nine Critical Infrastructure Projects Designated By Government
Two Arrested Following Interception Of Car Bomb In Monaghan
Nationwide Hosepipe Ban In Place From Today
Nine Infrastructure Projects To Be Fast-Tracked Under New Proposed Legislation
Fuel At The Pump Could Reach €2.30/L If Middle East Conflict Continues
Google Hit With €890M Fine By European Commission