Haiti

As the rainwater dumped by Matthew flows downriver, towns are being overwhelmed by devastating floods. "You're dealing with just massive amounts of water," one reporter says.

USAID is airlifting supplies that could help up to 100,000 people, including 40,000 blankets, 20,000 hygiene kits, and nearly 18,700 kitchen sets.

It's called Mayaro virus. It was first identified in 1954 and has been active near the Amazon. Now it appears to have popped up in Haiti.

Hurricane Matthew drowned and battered the island nation on Tuesday. At least 283 people died and, more than 48 hours after the storm made landfall, many of the worst hit areas are still inaccessible.

Hurricane Matthew killed at least 11 people in Haiti before it barreled north toward the Bahamas. Florida, Georgia and the Carolinas all declared states of emergency as they prepared for the storm.

Haiti's presidential election has been delayed multiple times in the past year. The country is being run by an interim president, whose constitutional mandate has already expired.

The Category 4 storm dumped rain on southwestern Haiti on Tuesday morning and lashed the island with maximum sustained winds of up to 145 mph. The hurricane is continuing north toward Cuba.

Authorities warn of "life threatening" wind and flooding in Haiti and have issued warnings for parts of Cuba, Haiti and Jamaica. The U.S. Navy evacuated families from its base at Guantanamo Bay, Cuba.