The cold will be colder and colder

I borned in south China ,but I worked in northeast China where is very cold in winter, the air here is very dry.I have to wear down coat and low heel boots many of my friends got sick due to the cold weather ,hope you can take care of yourself.
我出生在中国南方，但是我工作在冬天非常冷的东北，这里的的空气很干燥。我需要穿羽绒服和低跟的雪地靴。
我很多的朋友因为寒冷的天气感冒了，希望你能保重身体。

I was born in South China, but I work in Northeast China where it is very cold in winter. The air here is very dry. I have to wear a down coat and low heel boots. Many of my friends got sick due to the cold weather. I Hope you can take care of yourself.

The cold will become/be getting colder and colder

I was borned in south China, but I worked in northeast China, where it is very cold in winter and the air here (it is not 100% clear that you are now in Northern China) is very dry. I have to wear a down coat and low heeled boots. Many of my friends got sick due to the cold weather, but I hope you can take care of yourself.
我出生在中国南方，但是我工作在冬天非常冷的东北，这里的的空气很干燥。我需要穿羽绒服和低跟的雪地靴。
我很多的朋友因为寒冷的天气感冒了，希望你能保重身体。

The cold will be colder and colder

I borned in south China ,but I worked in northeast China where is very cold in winter, the air here is very dry.I have to wear down coat and low heel boots ,many of my friends got sick cold due to the cold weather ,hope you  can take care of yourself.
我出生在中国南方，但是我工作在冬天非常冷的东北，这里的的空气很干燥。我需要穿羽绒服和低跟的雪地靴。
我很多的朋友因为寒冷的天气感冒了，希望你能保重身体。