The met office on Sunday issued yet another yellow warning for high temperatures which are expected to reach 41C inlands.
Meanwhile, the heat prompted the forestry department to issue a red alert for the risk of fires.
“Lighting a fire without permission and throwing cigarette butts is strictly forbidden within state forests and a 2km radius,” the department said in a statement.
Violating this rule is an offence punishable with up to 10 years in prison or a fine up to €50,000 or both, according to the 2012 law on forests. The 1998 fire prevention law in rural areas specified a prison sentence up to five years or a fine up to €20,000 or both.
Calling on the public to be careful when using any agricultural tools or actions that may cause fire, the forestry department said anyone who sees smoke or fire can call the department at 1407 or the fire service at 112.
The yellow weather warning is valid from 11am to 5pm. The met office called on the public to be careful due to the extreme heat and said vulnerable groups are especially high risk such as the elderly and young children.
The weather forecast said temperatures would reach 41C inland, around 33C in the east, south and north coast and around 31C in the west coast and mountains.
Isolated showers or storms were possible in mountains and inlands on Sunday, the met office said.
The weather is not expected to change much until Wednesday where temperatures will continue to remain above average, especially in coastal areas and inland.