Data centre without sufficient power? You can run the servers without the air cond, which is probably not a good idea. Coincidentally, Primus data centre in Melbourne was suffering from massive down time today due to power issue (yes, again!!). See reported story and related discussions on Whirlpool.net.au.
The power dropped around 3:45PM and caused Victorian and Tasmanian customers from ISPs such as Exetel, iiNet, Internode and Netspace to lose their broadband connections.
Internode was able to route around the problem by 4:15PM, while the other ISPs were back online around 5:30PM.