Apparently some shithead started that shit on purpose:

Investigators are eyeing arson because the blaze erupted midday with no obvious cause — and it just happened to come at the end of the summer season, the sources told ABC News.

The fire is believed to have started under the boardwalk near Kohr’s Custard Stand on Thursday, wiping out six blocks of the boardwalk in Seaside Park.

Custard shop owner Bruce Kohr said his workers spotted the flames coming from under the planks — not inside the shop.

“They smelled the smoke. They came out. They saw the flames shooting out from underneath the boardwalk,” he told The Post.