POULSBO — Get ready for a hot weekend.

The National Weather Service issued a heat advisory for much of Puget Sound, including North Kitsap, from July 12, 11 a.m., to July 14, 6 a.m.

Temperatures are expected to climb into the mid-80s to lower-90s this weekend.

The National Weather Service advisory warns:

— “Take extra precaution if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening.”

— “Know the signs and symptoms of heat exhaustion and heatstroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water.”

— “To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location.”

— “Heat stroke is an emergency. Call 9-1-1.”

— “Open water can be very inviting during hot spells. If you plan to be in or near area lakes or rivers this weekend, be water safe and wear a life jacket.”

Here’s the National Weather Service’s forecast for Poulsbo through July 17.

July 11: Day, high near 87. North wind around 7 mph. Night mostly clear, with a low around 59. North wind 5 to 8 mph becoming calm after midnight.

July 12: Sunny, with a high near 88. Light and variable wind. Night mostly clear, with a low around 58. North wind 5 to 8 mph becoming calm after midnight.

July 13: Sunny, with a high near 87. Light and variable wind becoming north 5 to 10 mph in the afternoon. Night mostly clear, with a low around 63.

July 14: Sunny, with a high near 86. Night mostly clear, with a low around 62.

July 15: Sunny, with a high near 87. Night mostly clear, with a low around 62.

July 16: Sunny, with a high near 86. Night mostly clear, with a low around 62.

July 17: Sunny, with a high near 85.

Six North Kitsap Fire & Rescue firefighters, including Chief Dan Smith, are assisting wildland firefighting efforts in Entiat and Spokane.

The state Department of Natural Resources on July 11 expanded its burn ban to include all forestlands under DNR fire protection west of the Cascades. The burn ban continues through Sept. 30.

“Washington is experiencing high heat and very low humidity, which is creating a dangerous situation,” Public Lands Commissioner Peter Goldmark said in a press release. “We are asking everyone to take extra care to avoid any risk of causing a fire.”

As of July 11, there have been 265 fires on DNR-protected lands this fire season, with the majority caused by humans, DNR reported.