The Category 4 storm came ashore in Haiti to cause damage and deaths as it moved through Cuba, the Bahamas and parts of the Dominican before heading to Florida in the USA.
Matthew had been threatening for a week before unleashing dangerous winds and heavy rain on making landfall. Many houses have been damaged, crops wiped out, roads made impassable and phone communications lost.
Emcor for IARU Region 2, Cesar Pio Holy HR2P, reports that the Federation of Amateur Radio of Cuba says hams in the three provinces were activated.
Area C Coordinator, Arnie Coro CO2KK, reported radio amateurs could be heard using VHF, 80 metres and 40 metres for emergency traffic.
Further the Radio Club Dominica has Amateur Radio in centres of operation are active, especially in the border areas with Haiti.
Other frequencies are also in use, and more reports on the Amateur Radio role can be expected later.
The US National Hurricane Centre in Miami said Matthew was now a Category 3 storm, but warn that fluctuations in intensity were expected and it remained a potent and dangerous storm.
In the US the Hurricane Watch Net swung into ‘Catastrophic Response Mode’, gathering update weather information from radio amateurs.
Emergency operations centres in Florida, Georgia, and Virginia had been activated. The storm is forecast to cause more damage when it moved across the United States.
Throughout the stricken area a regular net sent English and Spanish messages on 14.325 MHz and 7.268 MHz.
— Jim Linton VK3PC, Chairman IARU Region 3 Disaster Communications Committee.