Complex sentence: A total of 141 people were killed and the damage amounted to $284 million (1983 USD), although most of its impact occurred in Mexico, Tico's remnants moved into the United States, where they caused heavy rains and flooding.
Split into simpler sentences: A total of 141 people were killed and the damage amounted to $284 million (1983 USD). Though, most of its impact occurred in Mexico, Tico's remnants moved into the United States, where they caused heavy rains and flooding.