Typically, flood insurance policies have a 30 day waiting period before a new policy becomes effective. Additionally, FEMA has determined that “the Garrison Dam water release occurring on June 1, 2011, triggered a flood in progress that extends to the Missouri River Basin below Garrison Dam, ND, and the system of coordinated dams through Gavins Point Dam, at Yankton, SD, and the basin beyond. Based on the flood-in-progress exclusion at Section V(B), for coverage to be effective for losses caused by the flood resulting from the water release from Garrison Dam, ND, an SFIP [standard flood insurance policy] must have been in effect prior to June 1, 2011.”
This means that, in order to be certain that your house is covered, any new insurance policy needed to be issued by May 1, 2011. FEMA does at least say that they might individually evaluate whether claims will be subject to this exclusion. Thus, even if you purchased flood insurance after the May 1, 2011, you should still file a claim if you suffer damage due to the flood.
The 30 day waiting period is the product of the flood of 1993, where some homeowners were able to buy a policy right before their homes were damaged. Congress decided to close the loophole, so that purchasers were not able to time the purchase of a policy until after a known flood event was occurring.
There are some exceptions to the 30 day waiting period. Generally, the exception is if the flood insurance policy was required by a lender. Accordingly, some homeowners may have acted on recommendations to refinance their homes or take out a home equity line of credit so that a flood insurance policy could be purchased without a 30 day waiting period. If such a policy was purchased prior to June 1, 2011, then the flood-in-progress exclusion may not apply.