The following frequencies are commonly used for hurricane related activities:

20 Meters
14325 KHz National Hurricane Center primary hurricane tracking frequency
14265 KHz Primary SATERN frequency

40 Meters
7290 KHz is used for health and welfare traffic
7285 KHz is the Gulf Coast primary 40-Meter Frequency for emergency and priority traffic
7268 KHz often used as a secondary frequency
7260 KHz often used as a secondary frequency
7248 KHz Texas RACES

75 Meters
3873 KHz is the Gulf Coast primary 75-Meter frequency for emergency and priority traffic
3935 KHz is used for health and welfare traffic