MBP connects to internet directly via cable modem, but airport wifi not working

Today I came home to a broken wifi. I think Time Warner Cable had an outage in my area which confused my modem and airport router, but anyway. After a short while I was able to connect to the internet if I plug the cable directly from the modem to my laptop (which is how I am currently posting this question). But if I instead connect the cable to my airport and try to connect via my usual wifi network, I don't have any internet.  Here is what I have tried:
- cycle cable modem several times
- hard reset as well as factory reset of Airport
- trying to connect the cable modem to the airport via both WAN and Ethernet entry, power cycling the Airport, waiting several minutes on each to see whether I get internet
- Using Network > Assistant to create a new location and network
Under airport utility, the status messages I get are as follows:
- Internet Connection (tells me to cycle my cable modem, which I have tried)
- No DNS Servers (I haven't touched any DNS addresses, but this has never been an issue that prevents me from connecting to wifi)
- Ethernet unplugged (since I'm using the cable to write this message...)
My hardware is:
- MBP early 2011
- ubee cable modem (standard issue from TWC)
- Airport Express 802.11n (2nd generation).
My laptop is able to connect to other wifi networks, so that is not the issue.
Any help or advice is appreciated.

...And now it all of a sudden works. However, as I can't delete this post I hope others who have had similar problems may have solutions for future issues.

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