The Federal Emergency Management Agency says search and rescue teams are at the ready in Houston, poised to go to the aid of those stranded by Hurricane Ike.
But a FEMA spokesman, Mark Stone, says crews hadn't received any rescue calls by early Saturday afternoon. And Stone says teams don't "go out blindly" until calls come in.
At a sports arena in Houston, tractor-trailers and large sport utility vehicles sat idle as the vast storm churned northward across the state. Stone says federal officials are now seeking to pinpoint the hardest-hit areas.
Elsewhere in Texas, authorities say they have already been deluged by emergency calls from people on cell phones awaiting rescue from flooded homes.