Now the site is not loading at all for me. Oops, there it goes. I think it could be overwhelmed.

I think it just does not have data on smaller towns and cities. I've tried several US smaller cities and nothing works. However, your link does. I can get San Diego and Irvine, CA. But I can't get Redlands or Yucaipa, CA. I can't get Polson, MT (nor Kalispell nor Helena).

Edit: Update - Finally got some data on Polson, MT.