The tropical storm Earl is currently heading across Central America and HAM Radio Amateurs in the IARU Region 2 gather informations to support the local emergency services.

Everyone is requested to stay away from the following frequencies, since they are reserved for the emergency usage.

Mexico: 7.060 & 3.690 MHz
Guatemala: 7.075 MHz  
Belize: 7.177MHz  
USA Hurricane Watch Net: 14.325 MHz

For the remainder of the Atlantic hurricane season, Radio Amateurs are reminded of the following frequencies which have been notified from previous seasons:

Caribbean Emergency & Weather Nets: 7.162 & 3.815 MHz  
Eastern Caribbean Narrow Band Emergency System Net: 7.036 MHz USB (Olivia & MT63)  
Caribbean Emergency: 14.185 MHz  
Republica Dominicana: 7.065 & 3.780 MHz  
Cuba: 7.045, 7.080, 7.110, and 3.740 MHz  
Central America: 7.090 & 3.750 MHz  
Nicaragua: 7.098 MHz  
Panama: 7.085 MHz

USA:

Maritime Mobile Service Net: 14.300 MHz  
Salvation Army Team Emergency Radio Network (SATERN): 14.265 MHz

Source: http://www.iaru-r1.org/index.php/emergency-communications