After finishing checking and arranging the supplies in the safe house, Su Yao looked at her parents with a solemn expression.

“Dad, Mom, our current supplies can last for a while, but this heatwave isn’t the worst part. The system predicts that after two months of heat, acid rain will fall. That acid rain isn’t ordinary rain; some people who get wet will turn into zombies, while a smaller group may evolve superpowers. Plants and animals will also mutate, and the world will be in an even more dangerous situation.” Su Yao’s voice was low but clear, and every word landed heavily in her parents’ hearts.

Upon hearing this, her parents looked alarmed. Su Yao gently held their hands, offering comfort and strength. "So, Dad, Mom, we can't just wait passively. From now on, we need to exercise, strengthen our bodies, and prepare for the coming crisis."

The father was the first to calm down and nodded: "Yaoyao, you're right. We can't just sit here and wait to die. Go ahead and make the arrangements, we'll listen to you."

Su Yao began to develop a training plan for her parents. Every morning, before the first rays of sunlight had fully awakened them from the heat, the family would gather in the courtyard of the safe house. Su Yao would guide her parents in simple physical exercises, such as squats, push-ups, and jogging, gradually increasing the intensity from a few repetitions.

The mother was rather frail, and she was already out of breath after just a few squats. "Yaoyao, this is too hard, I don't think I can keep going," the mother said, somewhat dejected.

Su Yao encouraged her, "Mom, don't be discouraged. It's always like this at the beginning. Just keep at it every day and you'll make progress little by little. Think about it, only when we are strong can we protect each other in a world after the acid rain." Her mother gritted her teeth and continued to persevere.

When the daytime heat became unbearable, the family would practice meditation in the safe house, trying to sense and guide the energy within their bodies. Su Yao explained the principles and cultivation methods of supernatural abilities to her parents. Although they were older and their perception and comprehension abilities were relatively weaker, they tried their best with great seriousness.

During a meditation session, the father seemed to have gained some insight and excitedly said, "Yaoyao, I feel a warm current flowing through my body. Is this the energy you were talking about?"

Su Yao smiled with relief: "Dad, this is a good start. Keep it up. With continued cultivation, this power will become stronger and stronger, and you will be able to control it better."

At the same time, Su Yao did not let her guard down around the safe house. She used the system to monitor changes in the surrounding environment at all times and set up multiple early warning devices to prevent high-temperature mutated creatures or other dangers from approaching.

As the days passed, her parents grew stronger and their perception of their supernatural abilities became clearer. Meanwhile, Su Yao, in her spare time, studied information she had retrieved from her spatial storage about zombies and crystal cores, attempting to learn more about the post-acid rain world in order to better cope with it.

One day, the system suddenly issued an alarm: "Unidentified energy fluctuations have been detected approaching, and it is suspected that a powerful, high-temperature mutated creature is active nearby."

Su Yao immediately became alert, picked up her weapon, and told her parents to stay in the safe house and not go out. She stepped out of the safe house, activated her special ability shield, and cautiously probed in the direction of the energy fluctuations.

In a scorched wasteland, Su Yao discovered a gigantic fire spider. The spider was the size of a small hill, its entire body ablaze with flames. Its eight long legs left deep tracks on the ground, each step accompanied by fluctuations in intense heat.

Su Yao gripped her supernatural sword tightly and launched the first attack. She unleashed an ice-based supernatural power, shooting it towards the fire spider in an attempt to lower its temperature and weaken its power. Sensing the danger, the fire spider spewed out a stream of high-temperature spider silk, which collided with Su Yao's ice-based supernatural power, instantly evaporating a large amount of water vapor.

Taking advantage of the rising steam, Su Yao flashed forward, rushing towards the fire spider. She leaped high, her supernatural sword aimed fiercely at the spider's head. The fire spider reacted with incredible agility, dodging Su Yao's attack with a sidestep, and simultaneously swept a long leg towards her. Su Yao hurriedly used her sword to block, but was forced back several steps by the spider's force.

During the fierce battle, Su Yao discovered that the fire spider's abdomen was its weak point. However, the fire spider seemed to sense Su Yao's intentions, tightly protecting its abdomen and constantly attacking Su Yao with flames and spider silk, making it difficult for her to get close.

Su Yao calmed down and considered her options. She suddenly remembered a smoke bomb in her spatial storage that could temporarily disrupt the movements of living beings. She quickly retrieved it and threw it at the fire spider. The smoke bomb exploded instantly, releasing a thick cloud of smoke that enveloped the fire spider.

Disoriented and sluggish in the smoke, the fire spider seized the opportunity to attack again. She unleashed her full power, pushing her supernatural sword to its limit, and thrust it fiercely into the fire spider's abdomen. This time, the sword successfully pierced the spider's belly, and the fire spider let out a painful roar, its massive body beginning to tremble violently.

Su Yao didn't relax for a moment. She forcefully stirred the supernatural sword, further widening the wound on the fire spider's abdomen. After struggling a few times, the fire spider finally collapsed with a thud, turning into a ball of burning ashes.

Exhausted, Su Yao returned to the safe house, where her parents rushed to greet her. "Yao Yao, are you alright?" her mother asked anxiously.

Su Yao shook her head: "I'm fine, just a little tired. This experience has also served as a reminder that there are more and more dangers outside, and we must speed up our training and improve our strength."

In this apocalyptic world of extreme heat, Su Yao's family perseveres through hardship, gathering strength for the impending acid rain crisis and the unknown changes in the world. They know that only by becoming strong can they protect each other and find a glimmer of hope in this cruel world.