31.9 degrees at Mount Dillon on Wednesday
The warning was also issued for Longford, Westmeath, Leitrim, Cavan and Monaghan while a Status Yellow warning came into effect for the rest of the country and will remain in place until 9 am on Friday.
The hot weather led to the cancellation of local sports training as the highest temperature nationally – 31.9 degrees – was recorded at Mount Dillon, Roscommon on Wednesday.
Temperatures in the county reached 30 degrees yesterday (Wednesday) as Chief Medical Officer Dr. Tony Holohan urged people to take care while enjoying the sunshine.
Dr. Holohan said people should “regularly and liberally apply sunscreen that has a sun protection factor of at least 30 plus for adults and 50 plus for children, wear light and loose-fitting clothing that covers your skin, wear a hat and sunglasses, and keep yourself cool and hydrated”.
The current spell of hot weather is expected to last until Friday when Met Éireann forecasts a mix of warm, sunny spells and scattered showers.