Valley temperatures are expected to touch 90 degrees on Sunday and approach 100 on Monday and Tuesday.

The National Weather Service said Easter Sunday will be sunny with a high of 91 in Phoenix and a low of about 62 Sunday night.

Sunny days will continue Monday and Tuesday, April 10-11, and the highs are expected to reach 98 both days, forecasters said.

Temperatures on Wednesday are expected to peak at 95 degrees before heading lower by the end of the week. Friday’s high is expected to be 74, according to the National Weather Service.

Salt River Project officials said the high temperatures early in the week are expected to increase air-conditioner use, and they offer the following advice on how to conserve energy and keep utility bills as low as possible:

• Set thermostats to 78 degrees while home, and several degrees higher at night or when away. For every degree the thermostat is set above 80 degrees, a customer can save up to 3 percent on cooling costs.

• Close drapes and blinds during the day to keep out the heat. Windows can account for nearly 50 percent of the heat that enters a home.

• Replace disposable air filters or clean permanent ones at least once a month during the summer. A dirty air filter forces AC equipment to work harder, causing higher energy bills.

• Instead of lowering the thermostat, use ceilings fans to stay cool. Set ceiling fans to blow downward during the summer and turn them off when the room is empty. Fans cool people, not rooms.

• Unplug appliances and electronics when not in use. These items use energy even when they are turned off.

• Complete a free virtual home energy assessment to receive personalized energy saving tips and free energy-saving products. SRP also provides a low-cost in-home energy assessment that can help determine additional energy saving opportunities.