Oklahoma City Public Schools are closed only because the subject is plural and must have a singular verb "are."
If New York City schools are closed, they would be closed on the third Monday of February for Presidents' Day.
yes
are catholic schools closed in NYC on November 6 2012
New York City public schools were closed on Halloween 2012 due to Hurricane Sandy.
Baltimore City Public Schools are closed for spring break from April 18-April 25, 2011.
That requires a specific date you are asking for.
Yes, if you go to school in queens or Brooklyn . Otherwise, no.
No, because Columbus Day is a national holiday, all schools are closed.
Only if we have some snow accumulated
Burning of coal in a closed room will have suffocating effects.
New York City public schools will be closed Monday, October 29 due to Hurricane Sandy. It is likely they will close Tuesday as well because of the storm.