More than 6,000 Nassau homeowners hit hard by Superstorm Sandy are now receiving tax refund checks.

The county has begun sending out tax refund checks averaging $3,100 each.

Nassau County Comptroller George Maragos says the county is mailing $21.4 million in refunds to 6,700 homeowners and businesses affected by Sandy. The money is going to residents whose tax assessments weren't adjusted to reflect the property damage.

"Our county executive went to Albany and Gov. Cuomo was kind enough to authorize $35 million to reimburse those affected homeowners that were assessed at the old values," said Maragos.

The county says 2,000 other applicants' claims are still under review. If the county assessor signs off on those claims, it would mean up to $9 million more in refunds.