Su Yao knew that extreme cold could be followed by extreme heat, and the alternating natural disasters required her to be thorough. After completing the stockpiling of some supplies for extreme cold, she immediately began preparing for extreme heat.

She went to an electronics store, her sights set on the large freezers. These freezers had enormous capacities and well-designed interiors. The freezers she chose had excellent cooling performance and good insulation, capable of maintaining low temperatures for extended periods even in high temperatures. She carefully checked the freezer's specifications to ensure stable operation in extreme environments. Each freezer was like a treasure trove of cold-temperature storage; imagining them filled with supplies, Su Yao bought several without hesitation. She also purchased spare compressors and some repair tools so she could quickly fix them if they malfunctioned.

The purchase of popsicles and ice cream was also in the works. She contacted several cold drink wholesalers and bought a large quantity of popsicles and ice cream in different flavors. These sweet cold drinks not only cool you down in the sweltering heat but also relieve stress to some extent. She selected products with good sealing packaging and high sugar and cream content, because such popsicles and ice cream would melt relatively slowly at high temperatures. Watching boxes of cold drinks being loaded onto the truck, Su Yao could almost see her family enjoying the coolness in the scorching heat.

An ice maker is also a crucial item. Su Yao found a suitable ice maker at a professional commercial equipment store. This type of ice maker is highly efficient, capable of producing a large quantity of ice in a short time. Its material is heat-resistant and corrosion-resistant, making it durable even under continuous high-temperature conditions. She also purchased some ice maker filters and cleaning tools to ensure the ice maker can continuously produce clean and hygienic ice. With an ice maker, ice can be produced continuously, which is very useful for both food preservation and lowering indoor temperatures.

In addition to these, Su Yao also purchased a lot of insulation materials. She planned to add another layer of insulation to the roof and walls of the shelter to block the high temperatures from the outside. These insulation materials included aluminum foil insulation rolls that reflect sunlight, as well as foam boards with good insulation properties. Together with her family, she carefully installed these insulation materials in the key parts of the shelter, like putting a layer of armor on the shelter to resist the high temperatures.

Su Yao also had a detailed plan for the cooling equipment. She purchased several large industrial fans, which had strong airflow to promote air circulation and remove indoor heat. The fan blades were made of a special material that would not deform under high temperatures. She also selected some water-cooled air conditioners, which use water evaporation to lower the temperature, making them more energy-efficient than traditional air conditioners and suitable for use in a post-apocalyptic environment. She purchased enough water pipes and pumps for the water circulation system of the water-cooled air conditioners to ensure their proper functioning.

Regarding clothing, Su Yao prepared lightweight and breathable sun-protective clothing for the extremely hot weather. This clothing uses high-tech sun-protective fabric that blocks most ultraviolet rays. It also has many ventilation holes to allow sweat to evaporate quickly, keeping the body dry. She also bought a large number of sun hats and sunglasses. The wide brims of the hats effectively block sunlight, while the sunglasses protect her eyes from strong glare.

Su Yao didn't forget about water supplies. In addition to the drinking water she had previously stored, she bought many large water tanks. These tanks were placed in a shady spot in the shelter to prevent the water from getting too hot. She also prepared some equipment for purifying the water, such as simple filters and disinfectant tablets, in case of a potential water shortage.

Regarding medical supplies, she prepared a large quantity of medicines such as Huoxiang Zhengqi Water, Shidishui, and sunburn ointment to address issues prone to heatstroke and sunburn in extremely hot weather. She also purchased some saline solution and glucose injection to replenish lost fluids and electrolytes.

The selection and stockpiling of every type of material was Su Yao's powerful response to the extreme heat. She knew that only by taking into account both extreme cold and extreme heat could her family survive in this cruel post-apocalyptic environment. Every step she took carried her commitment to life and her hope for the future.