Beaches and coronavirus testing sites were closed, public transportation shut down and some evacuations in place early Monday after Tropical Storm Eta made landfall in the Florida Keys, bringing heavy rains to already flooded city streets after leaving scores of dead and over 100 missing in Mexico and Central America.

Eta made landfall late Sunday on Lower Matecumbe Key, Florida. The system’s slow speed and heavy rains posed and enormous threat to South Florida, an area already drenched from more than 14 inches (350 millimeters) of rain last month. Eta could dump an additional 6 to 12 inches (150 to 300 millimeters), forecasters said.

“In some areas, the water isn’t pumping out as fast as it’s coming in” warned Miami Dade Commissioner Jose “Pepe” Diaz.

Miami-Dade County Mayor Carlos Gimenez said he was in frequent contact with county water officials about the struggle to drain the flooded waters, which has stalled vehicles, whitewashed some intersections and even crept into some homes.

On Sunday night, authorities in Lauderhill, Florida, responded to a report of a car that had driven into a canal. Photos taken by fire units on the scene about 30 miles (48 kilometres) north of Miami showed rescuers searching high waters near a parking lot.

Firefighters pulled one person from a car and took the patient to a hospital in critical condition, according to a statement from Lauderhill Fire. Responders were continuing to search for others.

The US National Hurricane Center in Miami declared hurricane and storm surge warnings for the Keys from Ocean Reef to the Dry Tortugas, including Florida Bay.

Eta had maximum sustained winds of 65 mph (100 kph) early Monday and was centred about 25 miles (40 kilometres) northwest of Marathon, Florida, and 40 miles (80 kilometres) northeast of Key West. It was moving west-northwest at 14 mph (22 kph).

On the forecast track, Eta was expected to move out into the southeastern Gulf of Mexico and intensify into a hurricane late Monday or Tuesday.

In the Florida Keys, the mayor ordered mandatory evacuations for mobile home parks, campgrounds and RV parks and those in low-lying areas. Several school districts closed, saying the roads were already too flooded and the winds could be too gusty for buses to transport students. Several shelters also opened in Miami and the Florida Keys.

“Please take this storm seriously,” urged Palm Beach County Emergency Management Director Bill Johnson. “Please don’t drive through flooded roadways.”

The storm swelled rivers and flooded coastal zones in Cuba, where 25,000 had been evacuated. But there were no reports of deaths. Authorities in Guatemala on Sunday raised the known death toll there to 27 from 15 and said more than 100 were missing, many of them in the landslide in San Cristobal Verapaz.

Local officials in Honduras reported 21 dead, though the national disaster agency had confirmed only eight.

Eta initially hit Nicaragua as a Category 4 hurricane, and authorities from Panama to Mexico were still surveying the damages following days of torrential rains during the week.

In Guatemala, search teams first had to overcome multiple landslides and deep mud just to reach the site where officials have estimated some 150 homes were devastated. At least five bodies were pulled from the mud.

Firefighters’ spokesman Ruben Tellez said at least one additional person died in Guatemala on Sunday when a small plane went down while carrying emergency supplies to the stricken area.

In southern Mexico, across the border from Guatemala, 20 people died as heavy rains attributed to Eta caused mudslides and swelled streams and rivers, according to Chiapas state civil defence official Elias Morales Rodriguez.

The worst incident in Mexico occurred in the mountain township of Chenalho, where 10 people were swept away by a rain-swollen stream; their bodies were later found downstream.

Flooding in the neighbouring state of Tabasco was so bad that President Andres Manuel Lopez Obrador cut short a trip to western Mexico and was flying to Tabasco, his home state, to oversee relief efforts.

Hurricane Eta’s arrival in northeast Nicaragua Tuesday followed days of drenching rain as it crawled toward shore. Its slow, meandering path north through Honduras pushed rivers over their banks.