it took ten days for people to move back into their houses so im geussing ten days
About a year (365 days)
because boscastle is in a valley and there was loads of rainwater and it just all pilled up and it caused a flood
See the link below for a report on the Boscastle Flood of 2004.
The river jordan over flooded in 1963 to flood boscastle
In places around Boscastle and Cornwall
the boscastle flood of 2004 began between 5am ans 6am on the 16th of august
everyone was
16.4.04
Luckily nobody died in the Boscastle flood 1963 and several people were injured!
becasue it was
caravans
tom preston