Since midnight Tuesday, Travis County paramedics also reponded to at least 20 "slip and fall" incidents, where victims have fallen on the ice. Several of the incidents have resulted in injuries requiring ambulance transport to hospitals. Some of the injuries were potentially serious.

"It was really slippery as I was walking, and I should've just turned around and walked back in," said Susan Anderson, who slipped on the ice.

Brackenridge Hospital officials said most people brought to the emergency room Wednesday were hur falling on patches of ice. A spokesperson for seton told KVUE people seem to be heeding warnings to stay off the road, but they are not staying off their feet.

It has been rough going for some passengers at Austin-Bergstrom International Airport. Passengers are being urged to check the status of their flights before heading to the airport.  If the weather does deteriorate, crews and equipment are on standby to start de-icing planes if necessary. So far dozens of flights have been cancelled for Tuesday.

According to Austin Energy, at its peak, about 60 customers were without power at 9:30 a.m. Austin Energy repair crews were working on all outages. The outages all required tree trimming first to remove tree limbs that either broke into lines or were pressing across lines. There were no lines downed overnight or Tuesday. Austin Energy had 29 repairs crews and 23 tree trimming crews in service. By Tuesday afternoon, only four customers remained without power.

For those who lose power, Austin Energy says the best thing for you to do is to call 322-9100. When prompted, put in your powerlink number -- that's the number if the upper right hand corner of your bill. Austin Energy says that will automatically put your address into their computer system and that will get a crew to your area much faster than if you wait to talk to an operator.

TXU Energy customers who lose power should call 800-242-9113. Pedernales Electric customers should call 888-554-4732. Bluebonnet Electric is 800-949-4414. For the San Marcos Electric Utility, call 393-8313.

For a list of school and business closings, click here.

For preparedness tips from the Red Cross, click here.