It is rainy season in Korea. It usually starts in early from at the beginning of the June to at the middle of the mid-June.
It has been raining heavily since last week. According to the Korea Meteorological Administration, it has been the amount of rainfall has been unprecedented in Chungcheong-do and Jeolla-do province. Also, they said the rainy season will last until this Wednesday. Over dozens of people were killed by due to the heavy rain and landslide.
I hope no longer more death roll will be presented and it will pass soon.

REVISED:

It is rainy season in Korea. It usually starts in early to mid-June. It has been raining heavily since last week. According to the Korea Meteorological Administration, the amount of rainfall has been unprecedented in Chungcheong-do and Jeolla-do province. Also, they said the rainy season will last until this Wednesday. Over dozens of people were killed due to the heavy rain and landslide. I hope no more death roll will be presented and it will pass soon.

Hi Tony, 

I appreciate you effort for sending a composition again in our class related to the news that I also heard last weekend. You were able to give detailed information and used appropriate expression most of the time. Although, I changed a few patterns and word choices here to make the sentences even clearer. I hope you review this and keep making a composition to enhance your skills.

Teacher Neiz