"Didi...Didi..." The phone that had set the time rang out on time, waking up Chen Xin who was still asleep.

He reached out and grabbed the phone and took a look at the time above. Chen Xin put the phone back to the bedside table. After yawning, he rubbed his face and sat up from the bed.

He picked up the clothes placed at the head of the bed and put a shirt on his body. Chen Xin suddenly felt a chill passing from the clothes to him.

Shivering by the stimulation of the coldness, Chen Xin quickly retracted back to his bed.

After wrapping the quilt and warming the clothes on his body with the remaining heat from the quilt, Chen Xin poked his head out of the quilt and wondering what was going on today, and it would become so cold.

It's not the past. If it was a disaster, it suddenly became so cold in the morning, then it was probably a cold wave. It was not rare for a night to cool down by more than ten degrees in autumn and winter.

Moreover, the warmth effect of ordinary houses in the south is just that. The outside world cools down by more than ten degrees, and the house will drop by at least three or five degrees or even more without heating. It is normal to get cold in the morning.

But now it is the end of the world, and Chen Xin lives in a shelter with good warmth effects. Logically speaking, it shouldn't be so cold.

Could it be that there was something wrong with the ventilation system's warmth? This idea flashed through Chen Xin's mind, but it quickly dispelled the idea.

Although he felt cold now, it was just because he didn't wear much clothes on his body and had just crawled out of the warm bed and put on clothes with a relatively low temperature. In fact, the temperature was not so cold that it was unacceptable, and at least it looked a few degrees.

If there is a problem with the heating of the ventilation duct, causing the cold air from the outside to pour in directly, the temperature will be at least below zero.

In that case, what Chen Xin felt was not cold but ice.

Moreover, he only covered himself with a camel velvet quilt last night. Although the warmth effect is good, he can withstand the low temperature of zero degrees before a quilt can withstand the temperature of zero degrees.

Faced with this strange situation, Chen Xin did not think about it anymore. He quickly put on the clothes next to him one by one and crawled out of the quilt.

After putting on the clothes, although Chen Xin felt that his body was still cold due to the low temperature before the clothes, it was not as unbearable as he could not bear it.

Especially after Chen Xin turned out all the sweater, cotton pants that he had been in the closet and put them on, he couldn't feel the cold.

Previously, due to the insulation ability of the shelter, even if the outside temperature fell below zero, there were still more than ten degrees inside the shelter. As long as you wear a thicker jacket and have to work on your daily basis, Chen Xin didn't think it would be cold.

But today the sudden temperature dropped, which caught him off guard.

If it was a disaster, Chen Xin might have touched his phone to check the weather forecast before he left the bed, but now he can only look at the thermometer hanging on the wall of the living room after brushing his teeth and washing his face.

"Seven degrees? The temperature dropped by six degrees in one night. Isn't it that scary, right?" Chen Xin couldn't help but feel surprised as he looked at the temperature that had fallen to single digits on the thermometer.

I am in the shelter. Not to mention the surrounding reinforced concrete structure walls and the insulation measures inside, the ground temperature brought by the earthen mountain more than 200 meters high above my head will not cause the temperature of the shelter to drop so much in one night!

Chen Xin was deeply surprised and didn't even bother to eat breakfast, so he left the living room and came to the public space, intending to check the ventilation system.

However, looking at the ventilation system that was still running well and the obviously cool breeze blowing out of the ventilation system, Chen Xin couldn't help but touch his face. He already understood what was going on.

Chen Xin didn't think much about it. This was not a problem with the ventilation system, nor was there any problem with the insulation of the shelter. Unless he upgraded the ventilation system again or upgraded the shelter as a whole, this problem would not be solved.

After returning to the bedroom, he found a thermometer and checked that it was still useful, Chen Xinyou touched a large tool hammer from the workbench. Then he came to the garage room and changed into protective clothing, put on a protective mask, took a flashlight, and climbed into the small bunker with the communication antenna through the passage in the corridor.

As soon as the door was opened, a cold wind spread out, and instantly a layer of ice flowers formed on Chen Xin's protective mask.

Looking at the ice flower on the protective mask in front of him, Chen Xin reached out and touched it. Seeing that it could not be erased, he stopped caring about it. Anyway, it would not affect his vision.

After turning on the flashlight, Chen Xin glanced around the inside of the small bunker. As he expected, a layer of ice had formed near the vent, and the gap connecting the small bunker with the outside world was covered with a thick layer of ice, almost covering the entire gap.

Carrying the hammer, Chen Xin walked to the edge of the gap, and raised his hand and knocked it hard.

Fortunately, the ice layer was not very thick, although it was quite strong, but it could still be broken after a few knocks.

As Chen Xin smashed the ice layer that sealed the gap, more cold wind poured in.

Chen Xin raised the thermometer in his hand and headed towards the gap where the cold wind was pouring into the small bunker, showing a temperature of -34℃.

"Not it? Didn't it be? Didn't there be minus 4 degrees yesterday? It dropped thirty degrees in one night?" Chen Xin was a little disbelief. The cooling was so terrifying, it was similar to the horror that entered the Ice Age in the moment in the movie "The Day Afternoon".

However, if the temperature drops 30 degrees overnight, it will be similar to the effect shown in "The Day Afternoon". After all, the Ice Age is 8-12℃ lower than the normal temperature before the disaster, and it is not as cold as it is now.

But Chen Xin couldn't help but worry about another problem.

Before the disaster, the climate of Blue Star had actually been abnormal. At that time, scientists said that because the environment was destroyed and the solar activity cycle entered a very small period, the heat that shone on Blue Star weakened, and Blue Star was about to enter a small ice age.

But this has always been just a saying, and the Little Ice Age that scientists want to say has never come, although the time scientists predict is within thirty years.

But now in the case of Blue Star, it is very likely that it will directly enter the Ice Age, or it is now the Ice Age.

If the ice age is entered, it is expected that the extremely cold night will last longer.

Humans are creatures that need a warm environment to survive. Although we expand our range of activities to severe cold areas through construction, clothing, heating and other means, this does not mean that humans can survive for a long time when facing low temperatures of tens of degrees below zero.

Even for polar scientific research, it is difficult to have a long outdoor activity, and most of the time I stay in the scientific research station.
Chapter completed!