Just two years after the worst drought in the Panama Canal's history forced ships to wait weeks for passage and triggered multi-million-dollar bidding wars for transit slots, El Niño is again threatening the rainfall that feeds the waterway.With El Niño strengthening and reservoirs shrinking…<p><p>https://www.marinelink.com/news/el-nios-return-means-panama-canal-542543</p></p>