Storms are weather events that occur periodically and regularly after you unlock the Farming Advance Card and are a major part of the new gameplay in the Bronze Age. They cause damage to all Abodes that are outside the range of a settlement. Followers can repair the damage, but must be released from Abodes to do so.
Damage sometimes makes it impossible to release Followers from Abodes, even when the flag is raised. This may be a bug affecting only abodes where belief is ready to be collected.