The National Weather Service has issued a heat advisory for the Boston metro region this Saturday and Sunday, May 21 and 22, and community members are urged to take precautions. High temperatures and significant humidity are expected both days. To stay safe, review the following heat safety tips and ways to stay cool in Somerville. Most importantly, do not leave children or pets in a vehicle even if the windows are open, drink plenty of fluids, stay out of the sun, and limit your outdoor activity. If you need a place to cool off, Somerville Public Libraries will be open and air-conditioned during their regular hours this weekend. Safety Tips

• Never leave children or pets alone in a closed vehicle – even with the windows cracked open, interior temperatures can rise almost 20 degrees within 10 minutes.

• Slow down and avoid strenuous activity.

• Wear lightweight, loose-fitting, light-colored clothing; light colors reflect heat and sunlight and help maintain normal body temperature.

• Drink plenty of water, even if you are not thirsty. Avoid alcoholic beverages and liquids high in sugar or caffeine.

• Eat well-balanced, light, regular meals.

• Limit outdoor activities and exposure to the sun.

• If you do not have air conditioning, stay on your lowest floor and out of the sun. Use fans to stay cool and avoid using your stove and oven.

• If you must be outdoors, try to limit your outdoor activity to the morning and evening hours.

• Use sunscreen with a high SPF and wear a wide-brimmed hat.

• Be a good neighbor. Check on family, friends, and neighbors, especially older adults, those who live alone, those with medical conditions, those who may need additional assistance, and those who may not have air-conditioning.

• Do not leave pets outside for extended periods of time. Make sure they have plenty of water and a cool place to rest.

• If someone is showing signs of heat stroke, call 911 immediately. Signs of heat stroke include a body temperature over 103 degrees; hot, red, dry, or moist skin; a rapid and strong pulse; and possible unconsciousness. While waiting for help to arrive, move the person into a cool area, help cool them down with wet towels or a cool bath, and DO NOT give them fluids.

• For more safety tips, visit cdc.gov/extremeheat and somervillema.gov/keepcool.

Splash Pads

Many parks and playgrounds across the city have water play features or sprinklers. The following splash pads will be on this weekend:

• Albion Park

• Chuckie Harris Park

• Deanna Cremin Playground

• Dickerman Playground

• Florence Playground

• Grimmons Park

• Kenney Park

• Lexington Park

• Osgood Park

• Trum Field Playground

• Perkins Playground

• Walnut Street Park