Halloween is just about a week away, but spooky season started early for the U.S. housing market.

In September, more than 53,000 home-purchase agreements were canceled—or 15% of all homes under contract, according to Redfin data released Wednesday. That’s nearly a 14% jump from the same time last year.

The housing markets with the highest percentage of pending sales that fell out of contract include:

Minneapolis (11%)

Boston (10%)