Cooling centers are opening across Santa Clara County with weekend temperatures in inland parts of the Bay Area expected to soar into the upper 90s or even triple digits, officials said.

The incoming heat wave, expected to last through the weekend, prompted the National Weather Service on Thursday to issue a heat advisory for the entire region.

Santa Clara County is opening cooling centers at local libraries, parks and recreation grounds in San Jose, Santa Clara, Palo Alto, Cupertino, Los Altos, Los Gatos, Milpitas, Gilroy and Saratoga.

Outreach workers plan to make extra visits to homeless encampments in need of additional water and other resources, county officials said.

“We strongly encourage everyone to use the County Libraries and other cooling centers during these sweltering conditions,” Kathryn Kaminski, a county housing official, said in a release.

Find your nearest cooling center at www.preparescc.org/heatsafety or a list of San Jose’s libraries at www.sjpl.org/locations. Below is a full list of Santa Clara County cooling centers and their hours of operation over this weekend:

• Camden Community Center, 3369 Union Ave., San Jose (Friday to Saturday, 1 p.m.-9 p.m.)
• Central Park Library, 2635 Homestead Rd., Santa Clara (Friday to Saturday, 10 a.m.-2 p.m.)
• College Terrace Library, 2300 Wellesley St., Palo Alto (Thursday to Saturday, 10 a.m.-6 p.m.)
• Community Recreation Center, 969 Kiely Blvd., Santa Clara (Friday, 8:30 a.m.-5 p.m., and Saturday 8:30 a.m.-12:30 p.m.)
• Cupertino Library, 10800 Torre Ave., Cupertino (Friday, 10 a.m.-9 p.m., and Saturday, 10 a.m.-6:30 p.m.)
• Downtown library, 270 Forest Ave., Palo Alto (Thursday to Saturday, 10 a.m.-9 p.m.)
• Emma Prusch Farm Park, 647 South King Rd., San Jose (Friday to Saturday, 1 p.m.-9 p.m.)
• Gilroy Library, 350 W 6th St., Gilroy (Friday to Saturday, 10 a.m.-6 p.m., and Sunday 1 p.m.-5 p.m.)
• Los Altos Library, 13 South San Antonio Rd., Los Altos (Friday to Sunday, 10 a.m.-7 p.m.)
• Los Gatos Library, 100 Villa Ave., Los Gatos (Thursday to Monday, 10 a.m.-6 p.m.)
• Milpitas Library, 160 N. Main St., Milpitas (Friday to Sunday, 10 a.m.-7 p.m.)
• Mitchell Park Library, 2700 Middlefield Rd., Palo Alto (Thursday, 10 a.m.-9 p.m., and Friday to Saturday, 12 p.m.-6 p.m.)
• Morgan Hill Library, 660 W. Main Ave., Morgan Hill (Friday to Saturday, 10 a.m.-6 p.m., and Sunday, 1 p.m.-5 p.m.)
• Mountain View Community Center Lobby, 201 S. Rengstorff Ave., Mountain View (Saturday, 12 p.m.-7 p.m.)
• Mountain View Public Library, 585 Franklin St., Mountain View (Saturday, 10 a.m.-6 p.m.)
• Northside Library, 695 Moreland Way, Santa Clara (Friday to Saturday, 10 a.m.-2 p.m.)
• Police Services Fire Administration Building Lobby, 1000 Villa St., Mountain View (Saturday, 9 a.m.-3 p.m.)
• Rinconada Library, 1213 Newell Rd., Palo Alto (Thursday, 12 p.m.-8 p.m. and Friday to Sunday, 10 a.m.-6 p.m.)
• Roosevelt Community Center, 901 E. Santa Clara St., San Jose (Friday to Saturday, 1 p.m.-9 p.m.)
• Saratoga Library, 13650 Saratoga Ave., Saratoga (Friday to Sunday, 10 a.m.-6 p.m.)
• Senior Center, 1303 Fremont St., Santa Clara (Friday, 7 a.m.-3 p.m.)
• Woodland Library, 1975 Grant Rd. Los Altos (Friday to Sunday, 11 a.m.-5 p.m.)

County officials encouraged residents to “check in frequently with older adults and those with chronic conditions who are especially vulnerable to the heat, including family, friends, and neighbors,” and to call 911 for those experiencing distress due to heat.

Other tips provided by the county for dealing with the high temperatures:

• Drink plenty of water and beverages containing electrolytes even if you do not feel thirsty
• Avoid alcohol, caffeine, or lots of sugar because they can speed up fluid loss
• Limit physical activity during peak heat hours of 10 a.m.to 3 p.m.
• Never leave people or pets in a closed, parked car
• Cool off by taking a bath or shower
• Wear light weight, light colored, and loose-fitting clothing to help you keep cool
• Do not bundle babies or put them in heavy clothing
• Wear a wide-brimmed, vented hat or use an umbrella when outdoors
• Wear sunglasses and sunscreen
• Rest often and find shady places to cool down when outdoors
• Check on family, friends, or neighbors
• People taking medications should take extra precautions to stay out of the heat. Drugs such as stimulants can increase body core temperature and may predispose individuals to hyperthermia