Weather forecasters are predicting wild temperature swings across the eastern U.S. Wednesday was expected to be another scorcher before temperatures plunge as much as 30 degrees. On Tuesday, at least 50 heat records were broken and 21 places hit triple-digit temperatures. About 127 million Americans are under some kind of National Weather Service heat advisory, down from more than 150 million Tuesday. The sizzling temperatures sent utilities scrambling to keep the air conditioning and lights on because of the massive power demand.

The temperature in New York City has reached 100 degrees as the eastern U.S. sweltered under an extreme heat wave. According to the National Weather Service, Kennedy International Airport recorded 100 degrees Fahrenheit at midday Tuesday. Large swaths of the country were broiling under a heat dome, worsened by a humid atmosphere that's circling the East. After nearly 40 US cities broke record high marks Monday, the weather service expected dozens of records Tuesday when the heat dome should hit its peak.

New ice core data shows Greenland is the warmest it's been in more than 1,000 years. Until Wednesday's study, scientists didn't have recent ice core data. The last ice core was from 1995. This newer data from 2011 shows a spike in temperatures between 1995 and 2011. Scientists say warming in Greenland in the past may have been masked by local weather variability. But not any more. Climate change is blowing that away. The study's lead author says this a clear signal of climate change. It also matches increased ice melt run-off from Greenland.

Featured

The county was drenched with rain this past week with a few more inches expected to fall before the New Year’s ball drops at midnight Sunday.