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The National Weather Service has issued an extreme heat warning for San Luis Obispo, with forecasts showing temperatures approaching 100°F through Thursday evening. The alert is in effect until 8 p.m. on Thursday, Sept. 10, and officials say conditions should ease as the weekend arrives.
What the warning means for the area
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The NWS warns that unusually hot conditions can quickly elevate the risk of heat-related illnesses for people working or exercising outdoors, older adults, and those with underlying health issues. Temperatures this high can also strain local infrastructure and increase demand for cooling and medical services.
Local authorities and institutions are already adapting to the forecast. At 1 p.m. today Cal Poly sent a campus-wide Poly Alert urging students to stay hydrated, seek cooler indoor spaces and take frequent breaks. The message noted that some classes might shift to online instruction and directed anyone needing medical assistance to Campus Health and Wellbeing.
Immediate safety guidance
- Drink fluids regularly—don’t wait until you feel thirsty.
- Avoid strenuous activity during peak heat hours; reschedule outdoor work when possible.
- Use air-conditioned or shaded spaces; fans alone may not be sufficient in extreme heat.
- Never leave infants, young children or pets unattended in a vehicle—interior temperatures can become lethal within minutes.
- Check on neighbors, particularly older adults and those with medical vulnerabilities.
| Area | Forecast high | Warning ends | Key local actions |
|---|---|---|---|
| San Luis Obispo city | Up to ~100°F | 8 p.m., Thursday, Sept. 10 | Cal Poly sent alerts; possible move of some classes online; campus health resources available |
Public health officials emphasize that short-term precautions reduce the chance of heat stroke and dehydration. If someone shows signs of overheating—confusion, fainting, very high body temperature—seek emergency care immediately.
As the weekend approaches, forecasters expect a cooling trend. For now, residents and students are advised to plan daily activities with the heat advisory in mind and to monitor updates from the National Weather Service and campus communications for any changes.
