Visitors view frozen Niagara Falls in Niagara Falls New York

Visitors view frozen Niagara Falls in Niagara Falls, New York February 17, 2015. Temperatures dropped to 6 degrees Fahrenheit (-14 Celsius) on Tuesday and the National Weather Service issued a Wind Chill Warning in Western New York from midnight Wednesday to Friday. Picture taken February 17, 2015. REUTERS/Lindsay DeDario (UNITED STATES – Tags: TRAVEL ENVIRONMENT)