Tropical Storm Bertha is churning toward a second landfall in Texas after grazing southern Louisiana.
Authorities in the Bahamas have closed a majority of schools as Tropical Storm Imelda drops heavy rain and unleashes flooding in the northern Caribbean, with two people killed in Cuba.
A tropical tango known as the Fujiwhara effect can unfold when two storms move too close together and start to influence one another's strength and track.
Erin has exploded into a Category 5 hurricane in the Caribbean, according to the National Hurricane Center.
Erin strengthened into a Category 4 hurricane with sustained winds of 145 mph on Saturday morning.
This is the fifth tropical system of 2025 Atlantic hurricane season.