At least 53 municipalities in Mexico were affected by Katia. Heavy rainfall left flooding and numerous mudslides, with 65 mudslides in the city of Xalapa alone. Although damage estimates were unknown, preliminary reports indicated that 370 homes were flooded. Three deaths were confirmed to have been related to the hurricane, with two from mudslides and one from being swept away in floodwaters. Approximately 77,000 people were left without power at the height of the storm. Coincidentally, the storm struck Mexico just days after a major earthquake struck the country, worsening the aftermath and recovery. Hurricane Katia marked the first instance of three simultaneously active hurricanes since 2010. Katia's peak marked the second known time in Atlantic history and the first time since 1893 that three simultaneously active storms were at least of Category 2 strength.