As temperatures rise, staying cool means staying comfortable and healthy. National Grid is offering some tips on how to beat the heat, without putting a dent in your wallet.

Though you may be tempted to lower the thermostat, that could cost you.

You’re better off keeping the temperature as high as you can while still staying comfortable, according to National Grid spokesman Patrick Stella. For example, 78 degrees is better than 75 degrees.

Also be prepared for an outage, as a mid-week spike in temperatures comes at a time where there is more pressure on the system.

“One of the things about a heat wave during the week instead of on the weekend is that you have commercial customers, industry, everything’s open, plus anybody that’s home, working from home, so there’s a lot of load on the system during the week than if this happened during the weekend,” Stella said.

There are extra crews on standby to make repairs as needed, Stella said.

A few other tips: cover your windows, don’t run your oven if you don’t have to, and try to keep anything inside your home that creates heat to a minimum.