Topping the list, based on a workshop held by the BCI to review the effects of last year's flooding on business operations, is for companies to ensure they have all contact details for members of staff.
The main lesson that came out of the workshop was that most staff lists were out of date, and most companies affected by the floods said communicating with staff off-site was the biggest problem they faced.
The BCI said the floods exposed the inadequacies of communication channels used during an emergency between head offices and branches and with staff off-site.
The BCI found that most companies affected by the floods relied on mobile phone networks to contact off-site staff, but this had often led to network failure.
The issue of flooding will be one of the key topics to be discussed at the Business Continuity Expo to be held at ExCel London in the first week of April.