Houston residents are facing the emergence of toxic hammerhead flatworms following heavy rains and flooding from Hurricane Beryl. These invasive, foot-long worms secrete toxins that can irritate human skin and are fatal to pets if ingested. Experts warn that the worms can regenerate when cut in half, doubling their population, which complicates removal efforts. Instead of cutting them, residents are advised to use gloves and place the worms in a plastic bag with salt or vinegar before freezing them. The worms prey on earthworms, which are essential for soil health, raising environmental concerns. Hammerhead flatworms, native to Asia, have spread across various U.S. states, including Texas, where the current flooding has exacerbated their visibility.