ISTANBUL — Istanbul is grappling with its heaviest snowfall in seven years, which has affected hundreds of flights and shortened the workday for public servants.

On Jan. 9, Turkish Airlines (THY) announced on Twitter that all of its domestic flights from/to Ataturk Airport have been cancelled until midnight due to the continuing snowfall. Earlier, the airline announced the cancellation of 227 scheduled domestic and international flights from its Istanbul hub.

The airline also tweeted the following notice:

For tickets issued on January 7, 2017 and before; valid for all Turkish Airlines and AnadoluJet flights between January 6, 2017 and January 9, 2017 from/through/to Istanbul Ataturk Airport and Istanbul Sabiha Gokcen Airport, you can reissue your ticket until January 15, 2017 for a date no later than January 18, 2017, by calling Turkish airlines call center at +90 850 333 0 849, or via Turkish Airlines sales offices or by applying to the ticket-issuing agency. Please be informed that you should reissue your tickets before January 15, 2017 and fly before January 18, 2017.

Dear Passengers;
All our domestic flights until midnight from/to Ataturk Airport have been canceled due to severe weather.

— Turkish Airlines (@TurkishAirlines) January 9, 2017

Notice to our Passengers: pic.twitter.com/0sYeLYxyPC

— Turkish Airlines (@TurkishAirlines) January 9, 2017

To the attention of Turkish Airlines/AnadoluJet passengers who want to reissue their tickets: pic.twitter.com/pcKoDZd06D

— Turkish Airlines (@TurkishAirlines) January 8, 2017

According to TurkishMinute, services on some inter-city and city ferry lines were also suspended. Istanbul Governor Vasip Sahin also announced that the workday for public servants would end at 3:30 p.m. due to heavy snow on Monday.