US location data derived from Countries States Cities Database by dr5hn and contributors.
Source: https://github.com/dr5hn/countries-states-cities-database
License: Open Database License 1.0 https://opendatacommons.org/licenses/odbl/1-0/
Adaptation: United States records grouped by state, city/capital/municipality types selected, duplicate names removed, alphabetized. Derived database available as us-cities.json.
Selection: up to 10 cities per state ranked by population recorded in the source dataset, then alphabetized.
Country directory: country names and ISO2 codes from the same source; includes countries and territories. Derived data: countries.json.

Weather location corrections: Open-Meteo / GeoNames (https://open-meteo.com/en/docs/geocoding-api). Champhai town coordinates: OpenStreetMap node 245714304, ODbL, https://mapcarta.com/Champhai.