water in the house

the front door which is the only door I have, has a gap, about 1 inch between the door and the floor. 

the black line is the gap, big enough for mosquitoes and crawling things and water

last night the winds blew and the rains came and the water flowed under the door. So I did not know what to call the thing that stops it, it is the sill or threshold so google says, anyway called Moses this am and asked if he could install a threshold to keep the water out, I hope he can put a silicone layer between the wood and the tile below to seal the space. He did know what I mean, he was in Kumasi today so hopefully next week sometime he can solve the issue.
fyi
there is only one area code for the whole of Ghana so no matter where you are in the country the call goes through, it means you never know where the caller is when you answer the phone, kinda neat actually as folks are surprised when you are out of town