In response to an excessive heat warning issued Monday by the National Weather Service, several air-conditioned locations will be open to the public this week as cooling shelters. The heat advisory will be in effect from 2 p.m. Tuesday through 9 p.m. Friday.

Highs on Tuesday are forecast to be in the mid 80s to lower 90s warming to the 90s to near 105 on Thursday. Friday will be a bit cooler, but highs will still be in the upper 80s and 90s.

Prolonged periods of unusually hot weather can create a dangerous situation in which heat illnesses are possible. Drink plenty of fluids, but avoid drinks with caffeine, sugar, or alcohol, which can be dehydrating.

Stay out of the sun, and check up on relatives and neighbors.

Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during hot weather when car interiors can reach lethal temperatures in minutes.

Cooling shelters will be open at:

• Snoqualmie Valley YMCA, 35016 SE Ridge St, Snoqualmie, (425) 256-3115, 5 a.m. to 10 p.m. Monday through Friday, 7 a.m. to 6 p.m. Saturday, 8 a.m. to 6 p.m. Sunday, www.seattleymca.org/locations/snoqualmie-valley-ymca;

• Snoqualmie Library, 7824 Center Blvd SE, Snoqualmie, (425) 888-1223, 10 a.m. to 9 p.m. Monday through Thursday, 10 a.m. to 6 p.m. Friday, 10 a.m. to 5 p.m. Saturday, closed Sunday, https://kcls.org/locations/1537;

• North Bend Library, 115 E 4th St, North Bend, (425) 888-0554, 10 a.m. to 9 p.m. Monday through Thursday, 10 a.m. to 6 p.m. Friday, 10 a.m. to 5 p.m. Saturday, 1 to 5 p.m. Sunday, https://kcls.org/locations/1528; and

• Snoqualmie Valley Hospital, 9801 Frontier Ave SE, Snoqualmie, (425) 831-2300, 8:30 a.m. to 7 p.m. daily, http://snoqualmiehospital.org.

People can stop in to get out of the heat at any of these locations. Water, drinks with covers or caps and light snacks are allowed at each location. The hospital also has a public cafeteria and dining room.

Snoqualmie Valley Transportation buses are available to anyone who needs transportation to a cooling shelter. Service is available 5 a.m. to 9:30 p.m., Monday through Friday, for $1 per ride. Find the schedules at http://svtbus.org.

In excessive heat, it is important to watch for signs of heat exhaustion — such as weakness, clammy skin, fainting or vomiting — or heat stroke and call 911 if you or someone you know are experiencing symptoms.

Drink plenty of water. Avoid drinks with caffeine, sugar, or alcohol, which can be dehydrating.

King County animal control officers will also respond to calls about animals having problems due to the heat. Call 911 or 206-296-7387 for assistance.

More tips for dealing with heat are on the King County website.