SAN DIEGO - More than 26,000 people signed up over two days to have disaster alerts sent to them not just on their "land line" home telephones, but on their cell phones and e-mail addresses, county officials said Tuesday.

Hoping to improve the high-speed telephone alert system that helped evacuate an estimated 513,000 people last week, county officials created an Internet site - www.alertsandiego.org - to let people register their cell phone numbers and e-mail addresses Sunday evening.

County officials said their high-speed alert system sent out more than 387,000 prerecorded evacuation messages to people's home telephones during the still-burning wildfires. However, all of those calls were placed to land line telephones. The county implemented a new, complementary system recently that can not only send messages to land lines, but to cell phones, e-mail addresses, fax machines and personal digital assistants.

County officials said that currently, the only way for people to register is by visiting the Web site. People who do not have access to a computer, officials said, can either get a relative to sign up for them or use computers provided by county libraries.