article_snippet: (CNN)A massive power outage spread across Turkey on Tuesday, blacking out a broad swath of Turkey and affecting some flights.
article_snippet: Trams and subways were idled in Istanbul -- with more than 14 million inhabitants, the largest city in Turkey and the fifth largest in the world.
article_snippet: Homes and offices were left without electricity.
article_snippet: The capital, Ankara, some 250 miles from Istanbul, also was affected.
article_snippet: The outage extended to 45 of Turkey's 81 provinces.
article_snippet: Flightradar24, which maps real-time flight data on the Internet, tweeted that The outage was "affecting flights," and said 11 of its 16 air traffic monitoring systems receivers -- as distinct from Turkey's air traffic control system -- were not working.
article_snippet: The outage began at 10:36 a.m. (3:36 a.m. ET).