And if you check this BBC news story http://news.bbc.co.uk/2/hi/europe/4578599.stm you will see that generators are available because they used them to get the underground trains into the nearest station in order to evacuate in an orderly fashion
If you can read Russian, there is a lot more information on the BBC's Russian language page here http://news.bbc.co.uk/hi/russian/russia/newsid_4578000/4578219.stm The cascading failure affected Moscow and towns as far as 200km south of the city. 95% of people were evacuated from the Metro by 1pm. They are restoring power in phases, hospitals are expected to be running by 3 pm Moscow time. The outage hit the southern half of Moscow and some parts of the northern half of the city. Many traffic signals were down and militia officers were manually directing traffic. No mention of Internet stuff but they do point out that the space flight centre in Korolev was functioning normally. --Michael Dillon