No posts, sidebar, footer showing on home page

Suddenly there is nothing showing up on my homepage (www.seaislanddrive.com) except for the navigation menu at the top of the page and the page header. No sidebar, no posts, no footer. The other pages are working fine, and newly posted content is showing up in the magazine style archives pages I’ve created (accessible from the top nav bar), but when I click on the post title to go to read the post, again, nothing shows up.

Thank you so much for any help you can offer!