TACOMA, Wash. -- With temperatures jumping up into the high 80s and low 90s this week, the Puget Sound area is under a smog watch until Sunday.

A smog watch has been issued for King, Kitsap, Pierce and Snohomish Counties by the Puget Sound Clean Air Agency.

VIDEO: Puget Sound On Verge Of Smog Violation

People who are especially sensitive to pollution are advised to limit their time outdoors. Even healthy individuals should consider limiting their outdoor exercise, or plan to work out indoors.

The Department of Health reminds people with asthma and parents of children with asthma to limit outdoor activities during hazy, sunny, hot weather when ozone levels are high. Adults with lung and cardiovascular diseases (heart disease and stroke) should also be mindful of poor air quality.

With hot weather forecasted through Saturday night, the heat will result in ozone pollution rising to unhealthy levels. The communities most impacted are south and southeast of the core urban areas of Everett, Seattle and Tacoma where air quality is predicted to decline, said Amy Warren, spokeswoman for Puget Sound Clean Air Agency.

Air quality is predicted to improve overnight on Saturday as a push of marine air in the Puget Sound region will lower temperatures and improve the air-quality conditions to good on Sunday, Warren said.

From Snohomish County to the Cascade foothills in Pierce County, residents are being asked to keep from driving over the next few days and to refrain from mowing lawns.

According to the Seattle Times, if the Puget Sound region sees two more days this year with ozone levels over the limit, the area would be in violation of air standards.

Violations could mean more inspections for car owners, tougher standards for companies building factories and new formulas for gasoline.

In the early 1990s, high ozone levels triggered many costly new regulations, but the area was taken off the Environmental Protection Agency's "bad air" list in 1996.