# Pasadena and San Gabriel Valley Under Extreme Heat Warning and Air Quality Alert Through Friday *An Extreme Heat Warning and concurrent Air Quality Alert have been issued for Pasadena and the San Gabriel Valley, lasting until 8 p.m. Friday as temperatures climb toward 106 °F.* **Section:** Community **Tags:** Community, Heat-advisory, Weather, Air-quality-alert, Pasadena, San-gabriel-valley **Reading time:** 3 min An Extreme Heat Warning is now in effect for the greater Pasadena area and the San Gabriel Valley, and it will remain active until 8 p.m. Friday, Aug. 28, according to [Colorado Boulevard](https://www.coloradoboulevard.net/extreme-heat-warning-and-air-quality-alert-issued-for-pasadena-san-gabriel-valley-through-friday/). The warning comes as forecasts call for daytime highs near 106 °F on Wednesday and Friday, with heat indexes that could top 109 °F in parts of Los Angeles County. The same source also reports an Air Quality Alert covering the same region, signaling elevated pollution levels that often accompany extreme heat. Wednesday’s forecast calls for sunny skies, calm winds that shift to a southwest breeze of about 5 mph in the afternoon, and a high near 106 °F. Thursday will stay hot and mostly cloudy with a high near 105 °F and a heat index up to 108 °F, while Friday is expected to be mostly sunny with another high near 106 °F. Temperatures are projected to ease over the weekend, with Saturday’s high near 101 °F and a low around 67 °F, and Sunday’s high near 92 °F with a low near 64 °F. Residents are urged to take precautions as the combination of heat and poorer air quality raises the risk of heat-related illness. ## Warning Details and Forecast The Extreme Heat Warning and Air Quality Alert were issued by local authorities for Pasadena and the San Gabriel Valley, and they will stay in force through 8 p.m. Friday, Aug. 28. The warning is triggered when temperatures are expected to reach dangerous levels, and the Air Quality Alert signals that pollutants may exceed safe thresholds during the same period. Wednesday’s outlook features a high near 106 °F and a heat index that could climb to 109 °F in some parts of Los Angeles County. Winds will be calm in the morning before shifting to a southwest direction at roughly 5 mph in the afternoon. Nighttime temperatures are expected to drop to around 70 °F under mostly cloudy skies. Thursday will remain hot and mostly cloudy, with a high near 105 °F and a heat index that may reach 108 °F. Friday’s forecast returns to mostly sunny conditions, again pushing the high to about 106 °F. Throughout these days, the Air Quality Alert remains active, indicating that residents may experience reduced air quality alongside the heat. The weekend brings a modest relief: Saturday is projected to be sunny and hot with a high near 101 °F and a low around 67 °F, while Sunday will be sunny with a high near 92 °F and a low near 64 °F. Even with the cooler temperatures, the lingering heat can still pose health risks, especially for vulnerable populations. ## At a Glance - **Warning end time:** 8 p.m. Friday, Aug. 28 - **Air Quality Alert status:** In effect for Pasadena and San Gabriel Valley - **Peak temperature forecast Wednesday:** High near 106 °F - **Maximum heat index:** Up to 109 °F in parts of Los Angeles County - **Weekend high forecast Saturday:** High near 101 °F ## Public Health Guidance and Cooling Resources Health officials stress that extreme heat combined with poor air quality can quickly lead to dehydration, heat exhaustion, and heat stroke. The advice from the National Weather Service, as reported by [CurationsLA](https://www.curationsla.com/vibes/2026-07-26-la-heat-advisory-through-monday-nws-forecast), includes staying hydrated before feeling thirsty, limiting strenuous activity to early morning hours, and never leaving children or pets unattended in parked vehicles. Warm nighttime temperatures also mean that bodies do not get a chance to cool down, increasing the overall risk of heat-related illness. For residents seeking immediate relief, the City of West Hollywood has activated its Plummer Park Cooling Center when temperatures are expected to reach 90 °F or higher. The center, located at the Plummer Park Community Center Senior Lounge (7377 Santa Monica Boulevard), offers free air-conditioned space and is supported by free Cityline shuttle service, as detailed in the [July 31 article](https://www.curationsla.com/vibes/2026-07-31-high-heat-advisory-west-hollywood-activates-plummer-park). While the cooling center is outside the immediate warning zone, it illustrates the type of regional resource that Angelenos can use when local facilities fill up. Additional resources include signing up for the Alert LA County emergency notification system to receive real-time updates on weather and air quality, and checking the live map of cooling centers maintained by the City of West Hollywood, which lists both city-operated and neighboring LA-operated sites. The map and shuttle schedules are available at [weho.org/cityline](https://weho.org/cityline) and the city’s cooling-center page. Residents are encouraged to use these tools, especially those who lack reliable home cooling. ## Curator's Note Los Angeles neighborhoods like Pasadena and the San Gabriel Valley host many outdoor eateries, street markets, and community events that rely on comfortable weather. This warning threatens not only public health but also the viability of al fresco dining and weekend festivals, making it essential for businesses and residents to coordinate cooling-center use, hydration plans, and real-time alerts to keep the city vibrant despite the heat. --- Curated by VIBES News Desk · Published 2026-08-26 Source: https://www.curationsla.com/vibes/2026-08-26-pasadena-and-san-gabriel-valley-under-extreme-heat Cite as: CurationsLA, "Pasadena and San Gabriel Valley Under Extreme Heat Warning and Air Quality Alert Through Friday", https://www.curationsla.com/vibes/2026-08-26-pasadena-and-san-gabriel-valley-under-extreme-heat (published 2026-08-26). License: CC-BY-SA-4.0 (https://creativecommons.org/licenses/by-sa/4.0/) Structured manifest: https://www.curationsla.com/vibes/2026-08-26-pasadena-and-san-gabriel-valley-under-extreme-heat/manifest.json