The looming challenge of feeding a global population projected to reach 9 billion necessitates substantial increases in food grain production. Concurrently, climate change, manifesting through increasing occurrences of drought and heat stress, poses a significant threat to agricultural productivity. Drought and heat stress are critical factors causing substantial reductions in the growth and yield of crop plants. Heat stress, defined as temperature rise beyond a threshold causing irreversible damage to crops, along with decreasing rainfall and its variability, have escalated the frequency and severity of drought events. Recent data indicate a fourfold increase in drought frequency from the 1970s to the 2010s, highlighting the urgency of this issue. The impacts of these stresses are profound, with major crops like wheat, maize, rice, and sugarcane experiencing significant yield reductions. These reductions directly threaten global food security, particularly in countries like India, where a large portion of the workforce relies on agriculture. Addressing these challenges necessitates innovative and cost-effective approaches. Traditional agronomic and breeding methods have provided some mitigation but face limitations in cost and expertise. Emerging technologies, particularly nanotechnology, offer promising solutions. Nanoparticles, due to their unique physical and chemical properties, can enhance crop productivity under stress conditions. They improve seed germination, vegetative growth, and yield components by increasing chlorophyll content, net photosynthesis, and biomass accumulation. Additionally, nanoparticles boost antioxidant enzyme activities, enhance root hydraulic conductance, and improve nutrient use efficiency. The application of nanofertilizers further mitigates abiotic stress by reducing resource use and greenhouse gas emissions. Thus, nanotechnology presents a viable pathway to enhance agricultural resilience against drought and heat stress, ensuring sustainable food production in the face of climate change.