what $620 billion????

From the Federal Reserve Press Release:

In response to continued strains in short-term funding markets, central banks today are announcing further coordinated actions to expand significantly the capacity to provide U.S. dollar liquidity. Central banks will continue to work together closely and are prepared to take appropriate steps as needed to address funding pressures.

Federal Reserve Actions

The Federal Reserve announced today several initiatives to support financial stability and to maintain a stable flow of credit to the economy during this period of significant strain in global markets.

We will continue to adapt these liquidity facilities as necessary and will keep them in place as long as circumstances require.

Actions by the Federal Reserve include: (1) an increase in the size of the 84-day maturity Term Auction Facility (TAF) auctions to $75 billion per auction from $25 billion beginning with the October 6 auction, (2) two forward TAF auctions totaling $150 billion that will be conducted in November to provide term funding over year-end, and (3) an increase in swap authorization limits with the Bank of Canada, Bank of England, Bank of Japan, Danmarks Nationalbank (National Bank of Denmark), European Central Bank (ECB), Norges Bank (Bank of Norway), Reserve Bank of Australia, Sveriges Riksbank (Bank of Sweden), and Swiss National Bank to a total of $620 billion, from $290 billion previously.

These steps are being undertaken to mitigate pressures evident in the term funding markets both in the United States and abroad. By committing to provide a very large quantity of term funding, the Federal Reserve actions should reassure financial market participants that financing will be available against good collateral, lessening concerns about funding and rollover risk.

What? Liquidity operations have just increased to $620 million, up from $290 million? How did things get so bad?