Why was Seattle air so hazy, smoky during Astros-Mariners game?

Mariners activate Jean Segura, recall Ben Gamel from Tacoma

Almost one year ago, the Oakland Athletics and Seattle Mariners played a full game at Safeco Field with an AQI (Air Quality Index) of 220 due to wildfire smoke. Anything over 200

Peña's 18th-inning HR sends Astros past Mariners for sweep

On Their Feet, With Roars, Chants and Rally Shoes, Fans Tried to Will Mariners to Victory

Smoke from nearby wildfires creates eerie baseball scene

Why was Seattle air so hazy, smoky during Astros-Mariners game?

Peña's 18th-Inning HR Sends Astros Past Mariners 1-0 for Sweep [VIDEO]

Postgame Show! Mariners Smoke Angry Astros, Clinching Season Series!

Astros 1, Mariners 0: Houston wins Game 3 in 18 to sweep

Peña's 18th-inning HR sends Astros past Mariners for sweep – KIRO 7 News Seattle

Peña's 18th-inning HR sends Astros past Mariners for sweep

Seattle's air quality is the worst among major cities in world

MLB, WNBA postpone games due to smoke from Canadian wildfires - ESPN