National Grid is announcing rate increases up to 37% more than a customer's typical bill.

NStar customers may be in for similar increases as well. NStar spokesman Mike Durand tells WBSM News with more coal-fired power plants across the region closing, the demand for natural gas is quite high, but the infrastructure needs serious updates to meet the demand.

He's not sure how much NStar rates will increase by, but reminds customers there are ways to compensate.

Durand says the company will be filing their six-month basic service rates with the Department of Public Utilities by early November. The new rates will go into effect by January 1. Durand says the rate period does include warmer summer months, where energy rates are typically lower.