What is El Nino? -- Weather PBL

The video above gives general information about El Nino.  How will El Nino have an effect on California and our drought?
Listen to this radio broadcast.
Read this news article.
Read this magazine article.
Accuweather El Nino article
How are these three presenting the same information?  What is different in the articles and their analysis of the impact on California's drought?