Community centers, libraries, and senior centers across Orange County are now operating as cooling centers, offering residents a refuge from extreme heat and humidity. The National Weather Service has issued an extreme heat warning for inland Orange County, encompassing cities such as Anaheim, Santa Ana, Garden Grove, Fullerton, Orange, Mission Viejo, and Irvine. This warning is active until Thursday night at 8 p.m., with temperatures projected to reach between 90 and 100 degrees. The elevated temperatures and high humidity follow significant high surf along the coast, which was sparked by tropical storm Marie since this past weekend. Overnight temperatures tonight are forecasted to hover around 80 degrees, making it challenging for many residents to cool down or get solid sleep, particularly those without air conditioning.

Local county health officials previously warned that prolonged exposure to high temperatures significantly raises the risk of heat-related illnesses, including heat stroke and heat exhaustion. This risk is particularly high for vulnerable groups, such as children, seniors, individuals with chronic illnesses, pregnant women, and outdoor workers. An August 26 news release outlined symptoms of heat exhaustion, which include heavy sweating, muscle cramps, weakness, headache, nausea or vomiting, and dizziness. More severe warning signs of heat stroke include an extremely high body temperature, unconsciousness, confusion, hot and dry skin (without sweating), a rapid pulse, and a throbbing headache. To mitigate these risks, officials recommend staying indoors, drinking ample water, wearing loose clothing, and taking frequent breaks when working outside. For those without air conditioning, local cooling centers are highlighted as a crucial resource.

Specific locations across Orange County are serving this purpose. In Santa Ana, residents can go to both the Delhi Library and the Newhope Library, in addition to several local community centers and senior centers that are open during the extreme heat warning. Garden Grove offers the Chapman Library and the Tibor Rubin Library, as well as its local community center, as cooling options. In Fullerton, residents can utilize the city’s community center, located in downtown, to escape the high temperatures. For those in Anaheim, the Brookhurst Community Center and Haskett Library are available in the western part of town, among other cooling centers throughout the city.

Orange County Health Care Agency officials indicated in an unsigned Wednesday email that, "Based on the current forecast, we are not meeting the Excessive Temperature Annex implementation criteria of predicted ambient air temperatures of 95°F (Coastal Orange County) and/or 100°F (Inland Orange County) for three (3) or more consecutive days in five (5) or more Orange County cities." This suggests that while heat is significant, it does not currently meet the most stringent criteria for the coastal areas. State health officials, specifically the California Department of Public Health, note that climate change is contributing to more severe and longer-lasting extreme heat episodes. They also highlight that heat-related deaths are preventable, yet heat kills more people than other weather-related hazards. The department defines "extreme heat" as temperatures "much hotter than average," with an extreme heat event being "two or more days and nights of unusually high heat for a given geographic area." High levels of humidity, as currently experienced, can make outdoor temperatures feel even hotter than what a thermometer records.