Delta air-quality warning covers smoke and heat

Delta residents have a new air-quality warning to factor into afternoon and evening plans. The City of Delta says Metro Vancouver Regional District issued a **yellow air-quality warning** on **Wednesday, July 22, 2026** because hot, sunny weather is combining with local emissions and wildfire smoke. The practical move is simple. If your home is smoky or too hot, Delta says to spend time in cool indoor spaces, drink water, monitor chronic conditions, and check on people who may be more affected. ## Why Delta is warning residents now [The City of Delta notice](https://www.delta.ca/community-culture/happening-delta/news/air-quality-warning-july-22-2026) says smog, especially wildfire smoke, contains fine particulate matter that can pose health risks. The city points residents to Metro Vancouver for updates as conditions change. [Metro Vancouver says](https://metrovancouver.org/services/air-quality-climate-action/air-quality-data-and-advisories) yellow warnings signal high health risk, while orange warnings signal very high health risk. Its air-quality warning system covers the Lower Fraser Valley airshed, including Metro Vancouver and parts of the Fraser Valley Regional District. Environment Canada's B.C. AQHI summary listed Metro Vancouver southeast at **6, moderate risk**, with a **4, moderate risk** forecast maximum for Wednesday night, Thursday, and Thursday night. The same summary listed the eastern Fraser Valley at **10+, very high risk**, showing that nearby Lower Mainland communities can face different air-quality risk levels at the same time. ## What to do before going outside Delta's advice is most useful for people planning errands, outdoor work, sports, or time with kids and older relatives. The city says residents should carry rescue medications, such as inhalers, and seek medical help if severe symptoms appear. The quick checklist: - **Check current conditions**: use Metro Vancouver's air-quality updates or Environment Canada's AQHI summary before outdoor plans. - **Use cooler indoor spaces**: choose air-conditioned facilities if home air is smoky or too hot. - **Check on others**: contact people with chronic conditions, older adults, and neighbours who may be more affected. If heat is the bigger issue for someone nearby, Trends Today's [Surrey cooling-place bulletin](/local-news/surrey-extreme-heat-cooling-locations) lists how one Metro Vancouver city is framing cooling options during the same July 22 hot-weather period. ## When conditions may improve Delta says conditions are expected to improve by the weekend as the weather pattern shifts. Until then, check the latest warning and AQHI before choosing outdoor exercise, a long walk, or activities for children and older adults. ## Sources - [City of Delta air-quality warning](https://www.delta.ca/community-culture/happening-delta/news/air-quality-warning-july-22-2026) - [Metro Vancouver air-quality data and warnings](https://metrovancouver.org/services/air-quality-climate-action/air-quality-data-and-advisories) - [Environment Canada B.C. AQHI summary](https://weather.gc.ca/airquality/pages/provincial_summary/bc_e.html)