U.S. banking regulators are warning banking institutions to prepare their balance sheets for increased borrowing in the wake of Tuesday’s terrorist attack.

A joint press release from the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation, the Office of the Comptroller of the Currency and the Office of Thrift Supervision notes that market reaction could lead to temporary balance sheet growth at some banking organizations, including thrifts.

“This growth could occur if, for example, during this period corporate borrowers make unusual draws on their existing lines of credit or request new lines in response to a perceived need for extra liquidity, or if a banking organization were to receive unusually large deposit inflows. Absent other factors, increases in extensions of credit or large deposit inflows would likely result in an increase in total assets,” states the release.

Regulators say that banking organizations should prepare for the possible effects on their balance sheets that may occur due to significantly increased lending or deposit inflows.

In a separate release, the Fed is encouraging bankers to work flexibly with customers, whether companies or individuals, who have been affected by the disaster. “In particular, banking organizations are encouraged to take prudent steps to make credit available to sound borrowers, while taking into account current conditions in considering adjustments to the original terms and conditions of customers’ loans or transactions. Conducted in a prudent way, such practices are consistent with safe and sound banking practice and promote the public interest by assisting in recovery.”