The National Weather Service in Seattle has issued a heat advisory in effect through Friday, Aug. 4. Temperatures are forecast for the upper 90s, possibly reaching almost 100 degrees on Thursday.

The city of Mercer Island posted the advisory on its website, reminding residents not to leave children, people with health or mobility challenges, or pets in a parked car, even with the windows down. Car temperatures quickly become much hotter than the outside temperature.

The city encourages residents to check on elderly neighbors, and/or visit the air-conditioned Community and Event Center (8236 SE 24th St.) to stay cool during business hours. This week, the center is open from 7 a.m. to 9 p.m. Monday-Friday, 8 a.m. to 9 p.m. Saturday and 11 a.m. to 5 p.m. Sunday.

The city provided the following tips for dealing with excessive heat:

• Watch for signs of heat exhaustion or heat stroke in yourself and others.
• Call 911 immediately if you know someone who experiences symptoms.
• Do not leave children or people with mobility challenges in a parked car, even with the windows down. Call 911 immediately if you see unattended children in parked cars.
• King County animal control officers will respond to calls about animals in distress due to the heat. Call 911 or 206-296-7387 for assistance.
• Drink plenty of water. Avoid dehydration, which can occur when relying on drinks with caffeine or high sugar levels. Also avoid alcohol.
• Rivers and lakes are still cold, even though it’s hot outside. That can sap even strong swimmers’ strength in a matter of minutes. Wear a personal flotation device and avoid alcohol. Learn more about water safety and drowning prevention.

Call 911 with any heat-related health concerns.

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