Flooding affects all livestock, including honey bees. Where floodwaters have passed through bee hives, once the beekeeper can access the apiary, there are immediate tasks to undertake. 

Any hives that went under water are potentially damaged and contaminated. Any brood (juvenile bees) that went under water is likely dead. Swift action should be taken for flood-affected hives to have any chance of recovery:

If floodwaters were muddy or silty, comb/frames should be culled and bur