The heatwave is expected to strain California's power grid, particularly during the evening hours when solar generation decreases. Warm overnight temperatures will limit natural cooling, increasing energy demand for air conditioning. Southern California residents may experience discomfort due to elevated humidity, with heat indices in some areas feeling like the low 100s. Vulnerable populations, such as the elderly and those without access to cooling, are at heightened risk of heat-related illnesses. Additionally, high power prices in the SP15 hub reflect the increased demand.