Beaverton's annual National Night Out gathering at Evelyn Schiffler Memorial Park won't happen Tuesday, Aug. 4. The city pulled the plug Monday, citing dangerous wildfire smoke rolling into the metro area and forecasted temperatures near 100 degrees.

The event, hosted each year by the Beaverton Police Department to connect officers with the neighborhoods they serve, had been scheduled for 5:30 to 7:30 p.m. No makeup date has been announced.

The city said in its cancellation notice that conditions pose potential health risks and that canceling is in the best interest of all involved.

Beaverton isn't alone. Gresham also postponed its National Night Out on Monday for the same reasons.

What's driving the danger

Smoke from large wildfires near Spokane, Washington, is expected to drift into the Portland metro area Monday night, according to KOIN 6. Air quality is expected to jump from an AQI of 50 to 182 in roughly 12 hours, per IQ Air data cited by the station. Some 2 million acres are burning in over 30 wildfires across Oregon, OregonLive reported.

The Oregon Department of Environmental Quality issued an air quality advisory for the Portland metro area Monday, Aug. 3, expected to last at least through Tuesday afternoon, according to KXL.

Meanwhile, the National Weather Service issued a heat advisory for the Tualatin Valley, which includes Beaverton, from noon Tuesday, Aug. 4, through 11 p.m. Wednesday, Aug. 5. Afternoon highs of 95 to 100 degrees are expected, with KGW meteorologist Rod Hill forecasting a possible peak of 104 on Wednesday.

In a Monday weather alert, Hill said conditions will likely improve starting Thursday, Aug. 6, when the upper flow pattern shifts west.

How to stay safe

DEQ advises residents to stay indoors with windows and doors closed when smoke is heavy. Run air conditioning on recirculate, or move to a cooler location. Avoid strenuous outdoor activity.

Standard cloth or surgical masks won't filter harmful smoke particles, according to DEQ. Only NIOSH-approved N95 or P100 respirators offer protection for adults.

Residents can track air quality at aqi.oregon.gov or through the free OregonAIR smartphone app. To find a clean-air shelter, visit 211.org or call 211 between 8 a.m. and 6 p.m., Monday through Friday.