Hurricane Ophelia is set to cause widespread disruption to transport services across Ireland tomorrow.
Bus Éireann will not operate any of its nationwide services - including the Expressway network - from 5am until 2pm tomorrow.
The company will review the situation in the morning, and will attempt to provide some level of service in some parts of the country in the afternoon, but it is likely widespread disruption could continue for most of the day.
Dublin Bus said it is "considering the implications" of the weather alert for its services tomorrow.
Meanwhile, Dublin Airport and Shannon Airport are advising passengers to check the latest flight information before travelling to the airport.
Cork Airport said cancellations are likely, adding: "We ask all passengers to check flight status with their airline & to avoid travelling to Cork Airport on Monday unless absolutely necessary."
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Aer Lingus said a number of flights have been cancelled. Passengers are advised to check their website for details.
Some ferry services from Ros an Mhíl in Galway to the Aran Islands (Oileáin Árann) tomorrow have been cancelled a result of the impending weather.
Status RED warning extended across the country. Members of the public asked to not make any non-essential journeys and not to cycle. #Ophelia— An Garda Síochána (@GardaTraffic) October 15, 2017
Aer Arann flights to the islands have also been cancelled.
Gardaí have advised people not to cycle tomorrow.
Drivers of high-sided vehicles and motorcyclists should also be aware of the extreme danger posed by gale force winds as they are particularly vulnerable, gardaí said.
Meanwhile, the Road Safety Authority has said that driving tests have been cancelled in counties affected by the red weather warning tomorrow.