It might have taken a while, but summer is finally in full force this week with the first 90-degree heat wave of the year.

Temperatures in the area are expected to break 90 degrees today through Friday before dipping back into the 80s over the weekend.

It will be the first time this year that temperatures have been so high for consecutive days, said Gino Izzo, a meteorologist with the National Weather Service in Romeoville.

Prior to Tuesday, June 12 was the only day in 2008 to breach 90 degrees.

One saving grace, Izzo said, is that the humidity will not be unbearable, never getting much above 50 percent.

“It will be humid, but it’s not going to be remarkably so,” he said. “It’s going to feel pretty warm.

“I would call it an average, typical Chicago heat wave.”

The impending heat has not spurred Wheaton and Glen Ellyn to call for designated cooling centers as they have in past years on scorching summer days.

Glen Ellyn Village Manager Steve Jones said that there is no specific threshold requiring the centers and that many factors are considered.

“When you’re hitting the triple-digit heat/humidity index, I’ve seen towns kick into action, (but) there’s uniqueness,” Jones said.

One additional factor will come into play this year as residents battle the heat: the rising cost of living.

“Certainly with high energy prices, more and more … people might be cutting back [on air conditioning], so that’s something we’ll have to monitor,” he said.

Still, at any time people can find shelter from the heat at many public buildings.

The Wheaton Police Department, for example, has air conditioning, water and rest rooms, and the lobby is open 24 hours, Deputy Chief Tom Meloni said.

DuPage cooling sites include:

• Addison - Community Park, 120 E. Oak St.,  630-833-0100; and library, 2 Friendship Plaza, 630-543-3617.

• Addison Township - Township Hall, 401 N. Addison Road, Addison, 630-530-8161.

• Bartlett - Library, 800 S. Bartlett Road, 630-837-2855.

• Bensenville - Library, 200 S. Church Road, 630-766-4642; Deer Grove Leisure Center, 1000 W. Wood St., 630-766-7015; Village Hall, 12 S. Center St., 630-766-8200; and Edge II Ice Arena, 735 E. Jefferson, 630-766-8888.

• Bloomingdale - Library, 101 Fairfield Way, 630-529-3120; Village Hall Council Room, 201 S. Bloomingdale Road, 630-893-7000; and Stratford Square Mall, Army Trail Road and Gary Avenue, 630-539-1000.

• Bloomingdale Township Senior Center, 6N050 Rosedale Road, 630-529-7794.

• Burr Ridge - Police Department and Village Hall, 7660 S. County Line Road, 630-323-8181.

• Carol Stream - Aldrin Community Center, 391 Illini Drive, 630-784-6100; library, 616 Hiawatha Drive, 630-653-0755; Village Hall lobby, 500 N. Gary Ave., 630-665-7050; and Outreach Community Center, 345 S. President St., 630-260-7600.

• Clarendon Hills – Fire Department, 316 Park Ave., 630-286-5430; Police Department, 448 Park Ave., 630-286-5460; and library, 7 N. Prospect Ave., 630-323-8188.

• Darien - Police Department lobby, 1710 Plainfield Road, 630-971-3999; Indian Prairie Library, 401 Plainfield Road, 630-887-8760.

• Downers Grove - Lincoln Center, 935 Maple, 630-963-1300; Police Department, 825, Burlington, 630-434-5600; and library, 1050 Curtis St., 630-960-1200.

• Downers Grove Township - Township Hall, 4340 Prince St., Downers Grove, 630-968-0451.

• Elmhurst - Police Department lobby, 125 E. First St., 630-530-3050; library, 125 E. Prospect, 630-279-8696.

• Glendale Heights - Sports Hub, 250 Civic Center Plaza, 630-260-6060; and Glenside Library, 25 E. Fullerton, 630-260-1550.

• Glen Ellyn - Police Department lobby, 535 Duane, 630-469-1187; and library, 400 Duane, 630-469-0879.

• Hanover Park - Branch library, 1266 Irving Park Road, 630-372-7800; and Poplar Creek Library, 4300 Audrey Lane, 630-372-0052.

• Hinsdale - Police and Fire Building lobby, 121 Symonds Drive, 630-789-7070; and library, 20 E. Maple St., 630-986-1976.

• Itasca - Library, 500 W. Irving Park Road, 630-773-1699; and Police Department lobby, 540 W. Irving Park Road, 630-773-1004.

• Lisle - Library, 777 Front St., 630-971-1675.

• Lisle Township - Township Hall, 4711 Indiana Ave., Lisle, 630-968-2087.

• Lombard - Plum Library, 110 W. Maple St., 630-627-0316; and Yorktown Mall, Highland Avenue and Butterfield Road, 630-629-7330.

• Milton Township, Township Hall, 1492 N.  Main St., Wheaton, 630-668-1616.

• Naperville - Municipal Center, 400 S. Eagle, 630-420-6111; all fire stations, 964 E. Chicago Ave., 601 E . Bailey Road, 1803 N. Washington, 1971 Brookdale Road, 2191 Plainfield/Naperville Road, 2808 103rd St., 1380 Aurora Ave., 1320 Modaff Road, and 1144 W. Ogden Ave., 630-305-5900; 95th Street Library, 3015 Cedar Glade Drive,  Naper Boulevard Library, 2035 S. Naper Blvd., and Nichols Library, 200 W. Jefferson, 630-961-4100.

• Naperville Township, Township Hall, 139 Water St., Naperville, 630-355-2786.

• Oak Brook - Library, 600 Oak Brook Road, 630-368-7700.

• Oakbrook Terrace - Police Department Council Room, 17W275 Butterfield Road, 630-941-8320.

• Roselle - Library, 40 S. Park St., 630-529-1641.

• Villa Park - Library, 305 S. Ardmore, 630-834-1164.

• Warrenville - Library, 28W751 Stafford Place.

• Wayne Township - Township Hall, 27W031 North Ave., West Chicago, 630-231-7140.

• West Chicago - Library, 118 W. Washington St., 630-231-1552.

• Westmont - Library, 428 N. Cass Ave., 630-969-5625.

• Wheaton - Police Department lobby, 900 W. Liberty, 630-260-2161; and library, 225 N. Cross St., 630-868-7520.

• Winfield - Library, 0S291 Winfield Road, 630-653-7599.

• Winfield Township - Township Hall, 130 Arbor Ave., West Chicago, 630-231-3591.

• Wood Dale - Library, 520 N. Wood Dale Road, 630-766-6762; and Village Hall, 404 N. Wood Dale, 630-766-4900.

• Woodridge - Police Department lobby, 1 Plaza Drive, 630-719-4740; Village Hall, 5 Plaza Drive, 630-852-7000; and library, 3 Plaza Drive, 630-964-7899.

• York Township, Township Hall, 1502 S. Meyers Road, Lombard, 630-620-2400.