Action Comics vol.1 #5 - Cover date October 1938
For the first time, Superman pits his mighty strength against the unfettered force of nature. The Valleyho Dam is in danger of bursting, and Superman races disaster after disaster to hold back the deadly waters from destroying thousands of homes and lives in the valley below.
Even the mighty Superman is no match for a rushing wall of water and, although he holds out until most of the town evacuates, the dam ultimately must break. In the maddening flood, Superman must rescue Lois Lane, caught in the terrible wave …
It may seem contrary to say this, but I have so little to add about this story because it is one of my favorites; It’s pure, abundant action from page 1, I like to just sit back and enjoy it.