She took the heat-insulating curtains outside and tested them in the sun. She felt that the effect was acceptable, better than the curtains she currently had hanging.

Then we replaced all the door curtains and window curtains with heat-insulating materials.

At the entrance, Lin Ruo studied two screen doors in her space. They were still made of black jade crystal, but with many small holes for ventilation. She used a simple buckle design for the door locks, so that Afu and Ashou could open the door and keep out mosquitoes.

After the curtains, screen doors, and door curtains were replaced, the already dimly lit fortress became even darker. Since the family of one person and two dogs both have night vision, they didn't care whether the house was dark or not. After the curtains were replaced, the house became much cooler. Afu and Ashou immediately ran to the curtains and tilted their heads to study them.

Ah Liu's willow branches also lifted the curtains, as if wondering why the house felt even darker after they were hung up.

Lin Ruo led Afu and Ashou to the door and carefully taught them how to use the latches on the screen door. After confirming that they could open and close the door by themselves, she returned to the training room to continue her training.

She still has too little control over that spatial energy; she needs to keep working on it.

Lin Ruo lowered the temperature inside the fortress, but the survivors outside suffered from the extreme heat.

Yesterday morning, the temperature dropped from -70 degrees Celsius to over 50 degrees Celsius, a difference of nearly 130 degrees Celsius. Many people didn't have time to react and suddenly fell ill and died in their sleep.

Many people realized what was happening and immediately took off their thick clothes, but many still suffered from heatstroke and dehydration, and some even developed heatstroke.

They began to sweat profusely, but their skin was unusually dry and burning. They also experienced dizziness, nausea, and vomiting.

These survivors were already severely weakened by the earthquake and tsunami of the previous days, lacking food and clothing. Coupled with the ailments caused by the extreme heat, and the lack of timely medical treatment, many of them did not survive and passed away on the very first day of the extreme heat.

Regardless of how many people die, the temperature continues to rise, and the ice on the surrounding ground begins to melt rapidly.

It wasn't until the sun shone down on the earth, scorching the skin of the survivors who were still exposed to the air, that they began to realize the severity of the situation.

The survivors who were still holding on in the urban area of ​​City B all ran towards the mountains, where there were trees to provide cover, which was much better than the open ruins of the city.

Those who went up the mountain were unaware that, due to the extreme heat of yesterday, many mutated plants in the mountains had awakened. Now that they had completed their mutations, it was time for them to feed, and the arrival of these survivors was a blessing to them.

Many humans attacked by the mutated plants died before they could even utter a cry of pain.

The mutated plants are absorbing the flesh and blood of these survivors and mutated animals, and are growing rapidly.