The victims are named as Gemma Cousin, 26, her husband Rhys, 25, and their daughters Peyton, three, and Heidi Cousin.
British nationals evacuated from a cruise ship are on their way to a hospital, where they will be quarantined.
Emergency crews were called to flooded homes after more rain hit the already-swollen rivers.
The victim suffered a wound to his neck, Westminster Magistrates' Court heard.
Internet jokers cause a circular hole outside a bank to rise up the TripAdvisor rankings.