With an extreme heat warning lasting until Tuesday evening, expect your air conditioner to be working harder than it has so far this year. Heat indices are expected to top 100 in parts of northeast Wisconsin on Tuesday, with temperatures in the 80s expected to last into the holiday weekend.

Wisconsin Public Service announced Monday that it is preparing for higher energy use with its "all of the above" power generation approach, which includes natural gas, solar and wind generation, to make sure customers' air conditioners, fans and cooling equipment can run around the clock.

Keeping cool during this heat wave can still have a negative impact on your power bill. Ultimate Air owner Jeff Blemke says to be nice to your air conditioner by not making it work harder than it needs to make your home more comfortable.

WPS also recommends closing blinds, shades and drapes on the sunny side of your home during the day and delaying heat-producing chores, such as cooking, doing laundry and running the dishwasher, until the evening hours. You can also seal any air leaks and use fans to help control the temperature inside your home. If you cannot avoid the heat, Door and Kewaunee counties have opened cooling shelters for the community to use. You can find a listing of those locations below.