With great regret.I find it necessary to request a leave of absence from my position as (your position) with (company's of office's name) effective immediately.
The recent heavy rainfall has has caused sever flooding and other issues in which must be dealt with in and around my my home.
My position with your company is an important part of my life yet our home life is affected to this extent immediate attention is necessary to bring those problem under control.
As soon as my problem are solved i would be rapidly come to the job as possible
Thank you for your consideration of my request