Modern civilization faces increasingly complex challenges during Great Heat as climate change amplifies traditional solar term patterns while creating novel vulnerabilities across interconnected urban, agricultural, and energy systems. Anthropogenic warming has significantly altered the fundamental character of this historical period, with temperature analysis revealing that Great Heat now averages 1.5-2.0°C warmer globally than during preindustrial baselines referenced in traditional solar term calculations. Urban environments experience particularly acute manifestations of contemporary Great Heat, where concrete and asphalt surfaces create persistent thermal islands registering up to 7-10°C above surrounding rural areas during nighttime recovery periods. Electrical infrastructure undergoes extraordinary strain during this solar term, as cooling demand creates peak loads that threaten grid stability while exposing socioeconomic disparities in climate-control access. Public health systems confront compounding challenges during modern Great Heat events, where traditional heat-related illnesses intersect with respiratory complications from intensified air pollution and infectious disease patterns altered by expanded vector habitats. Transportation networks become vulnerable during extreme manifestations of this solar term, with rail systems experiencing track buckling, roadways developing structural defects, and aviation facing reduced lift capacity during peak temperature hours. Economic productivity analysis reveals significant Great Heat impacts, particularly in construction, manufacturing, and agricultural sectors where outdoor work faces mandatory reduction during thermal extremes. Water resource management has emerged as a critical Great Heat challenge, with competing demands from municipal systems, energy production cooling requirements, and agricultural irrigation creating allocation conflicts exacerbated by diminished supplies. Contemporary architectural responses include advanced passive cooling designs, smart glass technologies, and vegetative roofing systems that specifically target Great Heat mitigation in building performance standards. Urban planning innovations incorporate Great Heat resilience through expanded green corridors, reflective paving materials, and artificial water features designed to reduce ambient temperatures at neighborhood scales. Energy system transformation increasingly prioritizes Great Heat resilience through distributed renewable generation, grid-scale storage, and demand-response programs that maintain essential cooling during peak events. Agricultural research focuses on developing climate-resilient crops specifically engineered to maintain productivity under Great Heat conditions predicted for mid-century scenarios. These multifaceted challenges position Great Heat as a critical focal point for climate adaptation planning, technological innovation, and policy development aimed at enhancing societal resilience against intensifying seasonal extremes projected throughout the coming decades.