More than 4,000 National Grid customers were without power Sunday afternoon.

The outage is affecting a large swath of customers from Lake Delta through River and Cavanaugh roads in Marcy, including the SUNY Poly campus, according to National Grid's website.

It remains unclear what led to the outage.

Among those affected by the outage is WIBX 950. We'll return to the airwaves as soon as it is possible.

Check back for updates...

Get up to information on power outages throughout Central New York; where it’s out and when it’ll be restored with National Grid’s Power Outage Map.

National Grid also offers text alerts on the latest efforts to restore power.

To receive free text message alerts and updates, text the word STORM to NGRID (64743).  E-mail alerts are available to customers who create an online profile on the company’s website.  All alert services can be started and stopped at the customer’s request.

You can even report power outages or get the latest information at National Grid’s website.

Power Outage Preparation:

*Keep your cell phone charged and make sure you know where your backup power supply is.
*Make sure all your flashlights have fresh batteries.
*Fill your gas tank. You can use your car to keep warm and recharge devices.
*Have some food available that you don’t need to cook.
* Download the WIBX App. You’ll receive local alerts, weather reports and more with push notification.