Supercharged seaweed, condo cracks, inside a company in crisis: Catch up on the day’s stories

CNN’s 5 Things PM brings you the stories you might have missed during your busy day.

👋 Welcome to 5 Things PM! A Texas mother is accused of buying ammunition and tactical gear for her son, despite repeated warnings about violent plans at his middle school. The boy’s grandmother alerted police. Here’s what else you might have missed during your busy day: 1️⃣ Toxic bloom: At least 31 million tons of supercharged seaweed are moving toward Florida and around the Caribbean, threatening a putrid invasion of idyllic beaches. As the sargassum rots on shore, it emits gases and produces an awful stench that repels tourists during the busy travel season. 2️⃣ Red flags: Hurricane preparations at the Federal Emergency Management Agency have slowed to a crawl, and the disaster relief agency “is not ready” for the June 1 start to the season, according to an internal review. The document outlines FEMA’s struggles and raises a number of concerns. 3️⃣ Company in crisis: UnitedHealth Group, one of America’s biggest corporations, is unraveling. The CEO stepped down abruptly for “personal reasons,” and then came news that the health care giant is under criminal investigation for possible Medicare fraud. 4️⃣ Buyer beware: Apartment owners at a luxury New York skyscraper are suing the building’s developers over alleged structural defects — including thousands of severe cracks on the super-skinny Park Avenue tower’s facade.