A man lost his life while swimming in the region over the weekend.
Another scorching day lies ahead today.
Met Éireann's status yellow high temperature warning could see it getting as hot as 32 degrees in places.
The highest heat in the country yesterday was recorded in the Phoenix Park in Dublin, which hit 29.3 degrees.
Alan O'Reilly from Carlow Weather has the outlook:
The Irish Coastguard is warning people not to swim in an area they're not familiar with.
Three people died while swimming last week, including a man in his 60s who got into difficulty while swimming at Derryounce Lake in Portarlington on Saturday.
Gerard O'Flynn from Coastguard Operations says people need to ensure their safety on the water:
The ESB has also issued a reminder on the dangers and potentially serious consequences of swimming in any ESB reservoir.
These areas are not appropriate for swimming because of the risk of deep and fast-flowing waters, changing water levels and uneven ground.
These waters include the reservoirs Golden Falls and Leixlip in County Kildare.
Ticket Prices Set To Rise For National Ploughing Championships
Taoiseach Warns Of Threats To Energy And Communication Cables
Irish Farmers To Join EU-Wide Protest In Brussels
Four Men Released Without Charge After Midlands Prison Assault Arrests
Community Mourns Mary Holt As Colleagues Lead Funeral Procession In Edenderry
Calls Grow For 24 Hour Garda Station In Edenderry After Arson Attack
Appeal Date Set For Jozef Puska Over Murder Of Ashling Murphy
Offaly Town Demands Meeting With Garda Commissioner And Justice Minister
Ireland’s First Kidney Pancreas Transplant Recipient Dies Aged 68
Quality Of Life To Drive Offaly’s Appeal For Foreign Investment - Anna Marie Delaney
Hundreds Of Mourners Gather For Tadgh Farrell's Funeral
Dancing With The Stars ‘A Once In A Lifetime Opportunity’ - Rose Of Tralee
Uisce Éireann To Submit €6b Water Project Plan
Pedestrian Killed In Midlands Crash
Maura Higgins Set For Traitors US
Man Taken To Hospital Following Alleged Westmeath Assault
Osteoarthritis Programme Launched At Midlands Hospital
Laois County Fire And Rescue Service Welcomes Two New Fire Appliances
Offaly TD Welcomes New IDA Ireland Investment