Yes, it is possible.
No it is not
No. San Antonia is much too far inland to be affected by a tsunami.
There is no Gulf possible between the regions as you state them - Mexico is to the west of Florida and therefor there can not be a Gulf WEST of Florida AND north and southern Mexico. Your question makes no sense and thus can not be answered.
The Gulf of Mexico touches Texas and Florida.
Gulf of Mexico
The Gulf of Mexico.
The Gulf of Mexico is almost 10 times larger, stretching from Texas to Florida and south to Yucatan and Cuba. Numerically, the Gulf of Mexico is about 600,000 square miles in area, the Gulf of California only about 62,000 square miles.
what does it mean is the point of putting the answer
The Gulf of Mexico is bigger.
The Gulf of Mexico, considered one of the biggest in the world in terms of area.
There is a gulf EAST of Mexico. West of Mexico is the Pacific Ocean.
Gulf of Mexico