The National Hurricane Center is monitoring three tropical waves in the Atlantic basin. Tropical wave 1: An eastern Atlantic tropical wave is along 23W, south of 14N, moving westward at 6 to 11 mph. Tropical wave 2: A central Atlantic tropical wave is along 43W, south of 13N, moving westward at 6 to 11 mph.

Up to 20 inches (51 centimeters) of rain could fall across the Mexican states of Oaxaca and Guerrero, with lighter amounts in Chiapas, Michoacan, Colima and Jalisco states, the Miami-based U.S. National Hurricane Center said in an advisory. The rainfall threatened flooding and mudslides, especially in areas with steep terrain.

Tropical Storm Erick formed early Tuesday near southern Mexico and is expected to become a hurricane by Wednesday.