Industrial actions in both countries have forced a number of airlines to cancel certain flights to both.
Airline travellers intending to leave Ireland today for Belgium and Italy are being advised to check airline websites ahead of their departure.
Industrial actions in both countries have forced a number of airlines to cancel certain flights to both.
So far, the the heatwave across Europe has not affected flights.
But Travel Journalist Eoghan Corry says there are certain dos and don'ts for tourists heading to countries dealing with intense heat.

€1.2m Approved For Zipline And High Ropes Adventure Centre At Donadea
Christmas Appeal To Adopt Dogs As Euthanasia Figures Rise
Speed Enforcement To Increase In Kildare With 21 New Camera Zones To Be Rolled Out In January
Over 400 Motorists Caught Speeding So Far Today, Including A Driver In Kilcock
Transport Minister In Discussions With Irish Rail About Extending Late-Night Trains Beyond Christmas
Tadhg And Mary Should Be Looking Forward To Christmas, Say Gardai As Fresh Appeal Launched
Bus Shelters Treated As Luxury Rather Than Standard, With 500 Kildare Bus Stops In Need Of Upgrades
Recruitment Announcements Don’t Add Up As Garda Numbers Stagnant In Kildare South, Says Local TD