The Road Safety Authority (RSA) is urging road users to exercise caution on the roads as Met Éireann has issued a weather warning for high temperatures.

The national forecaster said that maximum temperatures in excess of 27°C are expected in the coming days.

On Thursday, temperatures could possibly reach 30° in places.

Sun glare

With clear sunny conditions and high temperatures forecast over the next number of days, the RSA is advising drivers to reduce the risk from sun glare by wearing sunglasses.

"Be aware of the dangers of sun glare when travelling east in the mornings and west later in the day," the RSA said.

Road users should also ensure their windscreen is clear of grease or grime inside and out.

The RSA advised people to have plenty of window washer fluid to clear flies/insects and excess dust from the road when driving.

It said that road users should also be prepared and ensure they have adequate supplies of water.

"Any delays to journeys could result in road users being stuck in traffic for a period [of] time in hot conditions," it advised.

"Children and pets are particularly at risk during these hot spells of weather."

Slow down

Drivers must also watch out for vulnerable road users such as pedestrians, cyclists, horse riders and motorcyclists.

The RSA urges people to slow down and allow extra space when passing.

Pedestrians, cyclists and and motorcyclists are also asked to beware of the dangers that sun glare can cause, especially when crossing the road and at junctions.

The RSA said they should also follow current health messaging around the use of sun block when out walking and cycling.

'Most dangerous time'

The RSA said that the summertime is the "most dangerous time of the year on our roads".

"In the summer, when there are no obvious dangers, and the weather is fine and days are brighter, we drop our guard," it said.

"There can be a spike in pedestrian, people who cycle and motorcyclist casualties over the summer months as the fine weather brings more people on to the roads. 

"Drivers need to be on the lookout for them. Slow down and expect the unexpected."