Latest: Drivers warned as high temperatures see roads melting in the West

Update 6.45pm: There are reports of tar melting on roads in the west of the country with temperatures reaching as high as 30C degrees in some parts.

Mayo County Council has said crews are spreading grit on a number of routes that have already been affected by the high temperatures.

According to RTÉ, a number of roads have already needed repair and gritting has already begun around Turlough, as well as Ballinrobe and several spots in Connemara.

Temperatures are expected to reach upwards of 30C over the coming days.

Motorists are being urged to take care as road conditions can become slick and very dangerous in the heat.

Meanwhile, people are being urged to conserve water supplies, as the heatwave continues.

Supplies in parts of the country including Athlone, Kilkenny and Longford have already seen outages.

The situation is being closely monitored in Donegal, Galway, Limerick and Mullingar.

Earlier: Water outages in Athlone, Kilkenny, Longford and Dublin as temperatures hit 30 degrees

Irish Water has thanked the public for reducing consumption, but says demand is still critically high.

The utility says water use in the Greater Dublin Area has fallen slightly.

Parts of the country have already seen outages in water supply including Athlone, Kilkenny, Longford and north Dublin.

The situation is being closely monitored in Donegal, Galway, Limerick and Mullingar.

As temperatures continue to soar, people are being reminded to take extra care in the sun with temperatures set to reach 30 degrees in some parts.

It will be cooler along coasts but the Irish Cancer Society says it is still important to apply good SPF and reapply regularly.

Earlier: Temperatures to hit 30 degrees; Irish Water warn supplies could be restricted

Temperatures are forecast to hit 30 degrees in many parts of the country today, as the heatwave continues.

Irish Water is warning that supply may have to be restricted in the Greater Dublin area if demand remains high.

Irish Water's Drought Management Team is meeting this morning to assess water supplies countrywide.

It says water restrictions will become unavoidable, because demand is very close to outstripping the supply available.

The utility's again urging households and businesses to limit water use.

Met Eireann's Joan Blackburn says today will be hot and sunny in many parts: "Particularly in western parts of the country over parts of Connacht and west Munster, we will see temperatures of about 30 degrees.

"Generally sunny conditions in most places though a bit of high cloud in southern counties at times making it a bit more hazy but really warm everywhere."

Digital Desk

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