The Trinity College professor reached the peak of the world's highest mountain this morning.
The 39-year-old was part of an eight -member expedition that includes a number of Irish climbers.
In a statement, Trinity College Dublin says it is offering any support it can to his family at this extremely distressing time, and remains hopeful that he will be found safely as soon as possible.
The Department of Foreign Affairs says it stands ready to provide consular assistance if requested.
29C Highs In Wicklow With Temperature Warning From Tomorrow
The hosepipe ban remains in place for another two weeks amid this latest hot spell.
Wicklow Wexford TD Wants To Create A "Tobacco-Free Generation"
Suspicious Device Prompts Security Alert In Co. Kildare
Motorists travelling between Kilcullen and West Wicklow may be impacted.
Patients Urged Not To Attend GP Practice In Bray Amid Suspension Order
The Medical Council has issue a strong warning regarding Dr Regine Grah, who is suspended from the Medical Register by order of the High Court.
Anti-social Behaviour In Bray Raised With Justice Minister
Wicklow TD Edward Timmins contacted Minister Jim O'Callaghan as residents in the Boghall Road area report ongoing problems.
Sunny intervals
High: 26°C | Low: 16°C
Sunny intervals
High: 26°C | Low: 16°C
Sunny intervals
High: 25°C | Low: 15°C
Sunny intervals
High: 26°C | Low: 16°C
Sunny intervals
High: 25°C | Low: 15°C
