Mayor Bill de Blasio asked New Yorkers Wednesday to limit power usage as the intense heat wave continued.

“I'm asking every New Yorker to be a part of this, turn off anything you don't need to be on right now,” de Blasio said at a news conference with emergency response officials. “If you can wait until tomorrow to use certain appliances, wait. This is what we have to do."

The mayor said the city was seeing a number of localized outages across the five boroughs, including in Williamsburg, where 1,700 customers were without power Wednesday afternoon. Across the city, Con Edision reported 3,400 customers without electricity. 

"The most important message now is we don't want to see things go from bad to worse," de Blasio said.

Con Edison brought in crews to assist Williamsburg residents and supplied dry ice to help keep food cool, officials said. An air-conditioned MTA bus was also brought in to serve as a cooling center.

The mayor warned there could be more outages over the next few days if New Yorkers don’t limit their power usage.

"The most important message now is we don't want to see things go from bad to worse," said de Blasio.

Wednesday marked the fourth day of the heat wave. With readings near 100 degrees, it was the hottest day since September 2015. 

This June has had the most 90 degree days in 30 years.

"This is a really big strain being placed on our electric system by this level of heat for this many days," said de Blasio.

The mayor also reminded New Yorkers that if they do not have access to air conditioners, the city has opened cooling centers across the five boroughs. For more on how to access these services, call 311 or visit