Tenth exercise. Practicing writing.

Hi everybody,
I am writing today from about a very cold night in Spain. The temperature has fallen down severely and it's freezing almost everywhere here in the Iberian peninsula.
We are putting maximizing the performance of the heating systems to their maximum performance, to compensate for the outside cold.
We are wearingUsing the warmest clothes we have available and will not going outside unless it is essential.
Really, it's a good night for staying at home and watching television.
Perhaps we'll be lucky and tomorrow when we'll get up we'll find everything white and snowy.
It should be a great day for children , ;  they should play with the snow, making snowmen and having snowball wars fights and big dolls.

Thank you for your help.

Tenth exercise. Practicing writing.

Hi everybody
I am writing today about a very cold night in Spain. The temperature has fallen down severely and it's freezing almost everywhere here in the Iberian peninsula.
We are putting the heating systems to their maximum performance to compensate for the outside cold.
Using the warmest clothes we have available and not going outside unless it is essential.
Really, it's a good night for staying at home and watching television.
Perhaps we'll be happy and we'll get up early and will find everything be white and snowy.
It will be a great day for children, they will play  snowballs and make snowman.

Thank you for your help.

Tenth exercise. Practicing writing.

Hi everybody
I am writing today from a very cold night here in Spain*. The temperature has fallen down ("Down" is not necessary here, as the only way to fall is down. However having it here is not wrong either).  severely and it's freezing almost everywhere here in the Iberian peninsula.
We are putting the heating systems to their maximum performance to compensate for the outside cold. We are using the warmest clothes we have available, not going outside unless it is essential.
Really, it's a good night for staying at home and watching television.
Perhaps we'll be lucky and tomorrow when we'll  we get up we'll find everything white and snowy.
It should be a great day for children, they should  will play with snow making snow wars  (again, saying "making snow wars" is not really wrong, it's just that it is more often called a "snowball fight" ) having snowball fights and making big dolls  snowmen. 

Thank you for your help.

*this sentence is techniquelly correct, however I understand how it could be misunderstood. You could also say, "I am writing today on a very cold night here in Spain". Adding the "here" clarifies that Spain is where you are writing to us from and should limit misunderstandings.

Please note that the other correction where the corrector changes your sentence "Perhaps we'll be lucky.." to "Perhaps we'll be happy.." is incorrect. Your original use of "Perhaps we'll be lucky.." is exactly correct.