As winter storms swept across much of the United States in January, prospective homebuyers increasingly got cold feet.

Almost 40,000 home purchase agreements were canceled last month, according to a Redfin analysis, representing 13.7% of all homes that went under contract. That’s a record share for January, according to Redfin records dating back to 2017.

“More buyers are backing out,” said Alin Glogovicean, a Los Angeles-based Redfin Premier agent quoted in the analysis. “They’re second-guessing the wisdom of making a huge purchase when there’s a fear in the back of their mind about the state of the economy and the uncertainty of their finances.”

Among the 47 major U.S. metros with sufficient multiple listing service data to analyze, San Antonio led with a 21.2% cancellation rate. Atlanta was next at 18.5%, followed by Cleveland at 17.9% and Riverside, Calif., at 17.5%.

Redfin attributed the high rate of cancellations in those areas to the fact that they are all buyer’s markets based on the listings company’s definition, meaning home sellers outnumber buyers by at least 10%. The report noted that San Antonio has twice as many sellers as buyers and Atlanta has 80% more.

San Antonio also had the largest year-over-year increase in January cancellations. Last year, the Alamo City had a 15.6% cancellation rate.

But 11 of the metros analyzed in the Redfin report had a smaller share of pending home purchases canceled compared to the prior year, suggesting that pockets of the country have defied the shift toward increased buying power for prospective homebuyers.

The biggest decline in home purchase cancellation rate was observed in Tampa, Fla., which fell to 15.1% from 17%. Milwaukee dipped to 7.6% from 9.3% and Nassau County, located on Long Island in New York, fell to 4.8% from 6.4% last January.