A hurricane warning was issued Tuesday for a portion of southern Mexico as Tropical Storm Erick gained strength in the Pacific Ocean, forecasters said. The National Hurricane Center said Erick was expected to rapidly intensify and become a hurricane by late Tuesday or early Wednesday.

The National Hurricane Center said Tropical Storm Dalila has formed in the Pacific and will continue strengthening in the next couple of days.

As of early Tuesday, Tropical Storm Erick was positioned about 410 miles southeast of Punta Maldonado, Mexico, with sustained winds of 45 mph and higher gusts. The NHC has predicted a west-northwest movement with Erick strengthening to hurricane status by Wednesday morning.