LAGUNA HEIGHTS, Texas (AP) — One person was killed and a curfew was imposed after a powerful tornado tore through a community near the southern tip of Texas before dawn Saturday, damaging dozens of residences and knocking down power lines, authorities said. Instead, the first warning of a tornado “went out at the same time it was touching ground,” said Barry Goldsmith, a warning coordination meteorologist for the National Weather Service in Brownsville. The Texas tornado follows an outbreak of dozens of twisters in Oklahoma, Kansas, Nebraska and Colorado that caused damage but no reported deaths