If a catastrophe prevents a city council from holding an otherwise properly posted meeting, the council may convene at a convenient location within 72 hours of the properly posted meeting if the action is taken in good faith and not done to circumvent the Open Meetings Act. See Tex. Government Code §551.0411(b). A catastrophe is defined as a condition or occurrence that interferes physically with the ability of a governmental body to conduct a meeting, including a fire, flood, earthquake, hurricane, tornado, wind, rain, snow storm, power failure, transportation failure, interruption of communication facilities, epidemic, riot, civil disturbance, enemy attack or other actual or threatened act of lawlessness or violence. Id. at §551.0411(c). If the city council is unable to convene the meeting within 72 hours, it may only subsequently convene the meeting if it provides 72-hour notice of the meeting. Id. at §551.0411(b).