More than 1,300 flights were canceled across the United States on Monday due to the severe impact of Hurricane Beryl, which made landfall in Texas as it intensified.

According to the flight tracking website FlightAware, 1,331 flights were canceled, and 505 were delayed as of early Monday morning.

United Airlines (NASDAQ:UAL) had the highest number of cancellations, with 406 flights, followed by Southwest Airlines (NYSE:LUV), which canceled 268 flights.

Both airlines have issued travel advisories warning of disruptions at several airports, including Austin, Corpus Christi, Harlingen, and Houston.

Hurricane Beryl, which previously wreaked havoc in the Caribbean, killing at least 11 people, has reached Texas as a category 1 hurricane.

However, the U.S. National Hurricane Center has indicated that Beryl may strengthen to a category 2 by the end of Monday.

In anticipation of the storm, the largest ports in Texas ceased operations and halted vessel traffic on Sunday.

Meanwhile, the Federal Aviation Administration had already issued warnings on Friday about potential travel disruptions due to thunderstorms across the country.