According to Boom Beach Secrets (and a peek ourselves into the App Store), Boom Beach has been updated this morning to version 17.104.1. There are a lot of improvements and changes to the game. Most of them are visual upgrades. This is the full list of changes from the developer, Supercell:

What’s New in Version 17.104.1

Visual upgrades
– Magma Islands! Discover Magma Crystals by defeating the Blackguard on these volcanic islands
– New graphics for resource storages
– New statue graphics and effects
– Defense building visual improvements, including distinctive building bases to easily spot them
– Hot new effects: enemy HQ now burns when damaged, flamethrower fire and gunboat smoke improved
– Improved and extra boomy effects for rocket explosions and Boom Cannon shell impacts

Interface improvements
– Daily summary popup info is now more informative
– Enemy Activity log shows which lost villages can be attacked immediately
– You can now access the Armory to check unit stats and upgrade costs even while an upgrade is underway in the Armory (thanks to L3stat for the suggestion!)
– Fixed Rocket Launcher damage per second info (thanks to Rudeman for the correction!)

Gameplay and balance changes
– Trees will now randomly grow back on your home base island (thanks to everyone who suggested this!)
– If a lot of enemy base buildings remain after the HQ is destroyed, they will blow up faster
– New dive location for Radar level 5
– Improved endgame npc matchmaking, no more low level Blackguard bases for endgame players

Also bug fixes and several optimizations to speed up game loading and to improve overall performance.