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Know the process. Know the Terms


Know the process:
• The City will make the determination if an evacuation order is necessary. Should we call for one we will follow the Galveston County Hurricane Evacuation Zip-Zones Plan found here. The evacuation routes are also noted in this map.

• Should the City call for an evacuation that notice will go out via our Blackboard Connect system, website, social networks and all local media. Find links to all sources mentioned on the links page. 

• Seniors, citizens with special needs, and citizens with transportation needs can call 2-1-1 to register for evacuation assistance ahead of a disaster. Be sure to register early, as there may be limited space. 

• Should the City call for an evacuation order, those who are registered will be notified of specific instructions by the League City Office of Emergency Management. 

Know the terminology:

For hurricanes:

• Tropical Depression: An organized system of clouds and thunderstorms with a defined surface circulation and maximum sustained winds of 38 mph or less. 

• Tropical Storm: An organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds of 39-73 mph.
• Hurricane: An intense tropical weather system of strong thunderstorms with a well-defined surface circulation and maximum sustained winds of 74mph or higher. The type of damage that can be expected with each category of storm can be found here.

• Category 1: Sustained Winds from 74 - 95 mph
• Category 2: Sustained Winds from 96 - 110 mph
• Category 3: Sustained Winds from 111 - 130 mph
• Category 4: Sustained Winds from 131 - 155 mph
• Category 5: Sustained Winds > 155 mph

• Storm Surge: Storm surge is a large dome of water that sweeps across the coastline. The surge is greatest along and to the right of where the hurricane's eye makes landfill and occurs generally where the highest wind speeds are located in the eye wall. Storm surge poses the greatest threat to life and property for coastal communities. Ninety percent of hurricane fatalities are related to storm surge flooding. Here is a great link to the NOAA's explanation of them: click here.

• Hurricane/Tropical Storm Watch: Hurricane or Tropical Storm conditions are possible in the watch area within 48 hours.

• Hurricane/Tropical Storm Warning: Hurricane or Tropical Storm conditions are expected in the warning area within 36 hours. 

Other Severe Weather Conditions:

• Flash Flood Watch: Indicates that flash flooding is possible in and close to the watch area. Those in the affected area are urged to be ready to take quick action if a flash flood warning is issued or flooding is observed. 

• Flash Flood Warning: Signifies a dangerous situation where rapid flooding of small rivers, streams, creeks, or urban areas are imminent or already occurring. Very heavy rain that falls in a short time period can lead to flash flooding, depending on the local terrain, ground cover, degree of urbanization, degree of man-made changed to river banks and initial ground or river conditions. 

• Tornado Watch: Conditions are favorable for the development of tornadoes in and close to the watch area. Watches are usually in effect for several hours, with 6 hours being the most common.

• Tornado Warning: Tornado is indicated by radar or signed by storm spotters. The warning will include where the tornado is and what towns will be in its path.