The National Weather Service (NWS) announced on Monday that it has begun updating its maps, weather products, websites, and other materials to reflect the new federal name of Lake America for the body of water previously known as Lake Ontario.

The change follows an executive order signed by President Donald Trump on August 27 directing the Department of the Interior and the U.S. Board on Geographic Names to rename the lake within 30 days. The order cites the lake's role in supporting hundreds of thousands of U.S. jobs, billions in annual commerce, and critical water and power infrastructure as an essential freight corridor for iron ore, energy, and agriculture.

NWS officials stated that work is underway to update naming conventions as quickly as possible while exercising caution to avoid disruptions to operations. The updates will affect open waters forecasts, forecasts for the Niagara River and surrounding regions in New York.

The move comes after the president previously directed the renaming of the Gulf of Mexico to the Gulf of America. Google and Apple Maps implemented the Lake America designation for U.S. users earlier this month, displaying the new name domestically while retaining Lake Ontario for Canadian users and showing both for those outside the two countries.

The National Geospatial-Intelligence Agency updated the name in the official U.S. Geographic Names Server in late August following the executive order. The change applies to federal use and does not require adoption by Canada, New York state, or local governments.

Some NWS products as recently as September 13 still referenced the body of water as Lake Ontario, but updates are proceeding in phases across federal systems.