As the hurricane season sets in, news of the first tropical storm already came out: Tropical Storm Arthur formed Saturday near the coast of Belize, heading for the mainland. According to the U.S. National Hurricane Center, the storm was moving west across the Yucatan Peninsula, where heavy rain could cause floods and mudslides.

The storm, which formed one day before the hurricane season officially started, moved west at 7 miles (11 km) per hour, with maximum sustained winds of 40 miles (65 km) per hour east of the its center.

Tropical Storm Arthur is expected to bring up to 10 inches (125 to 250 millimeters) of rain in Belize and Guatemala, and up to 15 inches (380 millimeters) of rain in the southeastern regions of Mexico. Warnings have been issued for both Belize and the Mexican coastline.

Projections show a weakening of the storm as it crosses the Yucatan Peninsula towards the Gulf of Mexico. However, there are still chances to strengthen back into a tropical storm before hitting Mexico, meteorologist Jamie Rhome with the Hurricane Center told the Associated Press.

AT 11 p.m. the storm’s center was located over the southern Yucatan Peninsula, approximately 80 miles (125 km) west of Chetumal, Mexico, and 120 miles (195 km) south-southeast of Campeche, Mexico.

The upcoming hurricane season in the Atlantic Basin will be above normal this year, and residents in areas usually affected by them should be prepared.

Tropical cyclones have been responsible for killing millions of people and causing significant property damage. Hurricane Katrina killed over 1,800 people in the U.S. and cause damage estimated at $100 billion.

According to a study published by meteorologist Tom Knutson, global warming could diminish the number of hurricanes by the end of the century, however, they will be approximately 2 percent more intense.