Tropical Storm Beryl brought howling winds and torrential rain to southeast Texas on Monday, killing at least three people, flooding highways, closing oil ports, cancelling more than 1,300 flights and knocking out power to more than 2.7 million homes and businesses, Reuters reported.

Beryl, the season's earliest Category 5 hurricane on record, weakened from a hurricane after pounding the coastal Texas town of Matagorda with dangerous storm surges and heavy rain before moving across Houston, the US National Hurricane Centre (NHC) said. The agency said conditions could spawn tornadoes in Texas, Louisiana and Arkansas.

The storm, which was expected to rapidly weaken as it moved inland, swept a destructive path through Jamaica, Grenada, and St. Vincent and the Grenadines last week.

State officials had yet to assess the economic damage as officials remained on a rescue footing while powerful winds continued to blow. Restoring power would take several days, said Thomas Gleeson, Chair of the Texas Public Utility Commission.