Water has flooded everything in rural community? Don't let it worry you! (5,5)
I believe the answer is:
false alarm
'don't let it worry you' is the definition.
(a false alarm is nothing to worry about)
'water has flooded everything in rural' is the wordplay.
'water' becomes 'sea' (the sea is water).
'has flooded' means one lot of letters goes inside another (some letters flood into others).
'everything' becomes 'all' (all things).
'in' indicates putting letters inside.
'rural' becomes 'farm' (similar in meaning).
'sea' put within 'all' is 'alseal'.
'alseal' going inside 'farm' is 'FALSE ALARM'.
'community?' is the link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for false alarm that I've seen before include "unfounded scare?" , "Warning proving unnecessary" , "Panic over" .)