As she flipped through the newspapers, she saw headlines such as "Food shortages hit Mitika," "Hurricane departs coastline," and "Elkwood ravaged by flooding." Is my apostrophe and comma usage correct? Newspaper headlines are supposed to be lowercased, correct? (Except for the first letter and any proper nouns).

All looks perfect!! Congrats! =)

Your punctuation is correct.

Whether headlines are printed in upper or lower case depends upon the specific newspaper's style. The New York Times capitalizes most words in its headlines, but my local daily paper does not.

Yes, your usage of apostrophes and commas in the sentence seems correct. However, when it comes to newspaper headlines, the capitalization rules can vary depending on the style guide or the preferences of the publication. In general, newspaper headlines are often written in title case, where the first letter of each major word is capitalized, while articles, prepositions, and coordinating conjunctions are typically lowercased. Proper nouns and the first word of the headline are usually capitalized regardless.

So, in your specific example, if you were following title case capitalization for newspaper headlines, it would look like this: "Food Shortages Hit Mitika," "Hurricane Departs Coastline," and "Elkwood Ravaged by Flooding."

However, if you were following the convention of lowercasing all words in the headline except for the first letter and proper nouns, it would look like this: "Food shortages hit Mitika," "Hurricane departs coastline," and "Elkwood ravaged by flooding."

It's worth noting that different publications may have their own specific style guides and variations to these rules, so it's always a good idea to refer to the specific style guide of the publication you're working with if you want to ensure consistency.