Met Eireann has promised that the new heatwave will be “blue skies and hot” with bookies slashing odds that this will be the hottest summer on record.
Several records were broken recently when soaring temperatures peaked at 33 degrees Celsius in Dublin just last month.
Temperatures are again tipped to reach the 30s and the State forecaster has issued another weather advisory for warm weather – and it is to remain in place until Sunday.
Read More: Met Eireann pinpoints two hottest areas as Ireland set to bask in late summer heatwave
It is warning of dangers associated with "heatwave conditions" that are due from Wednesday.
Temperatures above 25 degrees Celsius are expected for a period of five days or more.
Met Eireann’s Joanna Donnelly said: “It is going to be blue skies, hot.
"It's settling over the country. The sun is heating us up directly. It is August so the sun is not as high as it was in June, but it's still high enough.
"Every day is going to get a little bit warmer.”
Temperatures of 22 degrees Celsius are predicted for Tuesday, 23C for Wednesday, 24C for Thursday, 25C for Friday, and 26C for Saturday.
Met Eireann’s bulletin stated: “Temperatures will become very warm towards the weekend.”
Top meteorologist Joanna explained the rising temperatures “will stay with us right through this week”.
She said: "From Wednesday we've got even warmer air. It's going to be blue skies, hot.
"After Thursday things might get a little bit uncomfortable. Overnight temperatures will be about 13C or 14C."
Met Eireann has also warned that it will be uncomfortably warm overnight with temperatures reaching 16C in places.
Met Eireann forecaster Conall Ruth said: "The nights will also be a good bit warmer than average, especially from around Thursday night onwards, with temperatures not really falling below the mid-teens.
"Generally, the southeast of the country is expected to see the highest temperatures over the coming days, but the midlands will then also get very hot as we head through the weekend.”
Alan O’Reilly of the Carlow Weather service believes temperatures could reach 31C.
Vulnerable members of the population have been urged to protect against heat stress.
High-level protection from suncream, hats, sunglasses, appropriate clothing and staying hydrated are all measures that have been advised.
Staying out of the sun between 11am and 3pm is also recommended.
Sunbathers have been warned that the hot weather will result in a high solar UV index – meaning more potential for sun damage to the skin and eyes.
Several warnings have also been issued to raise awareness of water-related perils.
Six people were rescued by Howth RNLI on Sunday in two separate incidents.
Three people were stranded on a small boat when its engine failed two miles north of Ireland’s Eye, an uninhabited island off the coast.
Another three people on an inflatable dinghy got blown offshore and were rescued amid fears that they were drifting away from Burrow Beach, which is known locally as the Hole in the Wall, and is tragically where Bradley Lulendo, 14, drowned last month.
Howth RNLI inshore lifeboat helm Ian Martin warned: “Inflatables, even in the slightest wind, can take you out to sea.
“That is why inflatables are not suitable for Irish waters.”
He added: “It’s also really important that anyone going out on the water wears a life jacket.
“With the good weather forecast for the coming week, we expect a lot of people will be spending time on or near the water.
“If you do get into trouble, remember to Float to Live - lean back, using your arms and legs to stay afloat.
“Control your breathing, then call for help or swim to safety. In a coastal emergency call 999 or 112 for the Coast Guard.”
Irish Water is monitoring its 750 water treatment plants across the country and has assessed that 13 areas have already been impacted by shortages in counties Cork, Clare, Galway, Kilkenny, Laois, Limerick, and Wexford.
A spokesperson said: "We will continue to monitor the levels at all our supplies over the coming weeks and months and take any actions that may be necessary to maintain supplies.”
Hosepipe bans and urging people to take shorter showers and re-use bathing water for washing cars has been advised in recent weeks.
Irish Water has also joined with the Clean Coasts organisation to promote a summer barbeque campaign called Think Before You Pour.
A spokesperson said: “Please spare a moment to think about the impact BBQs can have on your local environment if you dispose of fats, oils and greases (FOGs) incorrectly.
“Safeguard the wastewater network and our natural environment by collecting cooled FOGs and disposing of them in your food waste bin or general waste bin.”
Scientists warn that current heatwaves have been made hotter, longer and more frequent by climate change.
Phoenix Park recorded the highest 21st Century temperature record with 33C on July 18.
That was 12.8C above normal for the time of year and was only 0.3C below the all-time 135-year-old record set at Kilkenny Castle in 1887.
Bookmakers are wagering that the record could be beaten.
Ladbrokes spokesperson Nicola McGeady said: “Some punters are getting behind this month being one for the weather history books, with odds on August 2022 to be the hottest ever now slashed to 1/3 from 2/1.”
She added: “A recent surge in betting, coupled with Met Eireann’s heatwave warning, has forced us to slash the odds for August and indeed this summer being the hottest ever down to 1/2.”
FIVE-DAY FORECAST
- TUESDAY: Cloud will clear, leaving it sunny with highest temperatures touching 26C.
- WEDNESDAY: Dry with good sunshine and highest temperatures up to 26C.
- THURSDAY: Very warm or hot with highest temperatures of 27C and lowest night temperatures 16C.
- FRIDAY: Hot, dry and sunny with highest temperatures up to 28C.
- SATURDAY: Hot and dry through the weekend with max temperatures in in the mid to high 20s
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