Some 60 ATMs in Iowa have stopped operating because of flooding that has engulfed Cedar Rapids and Iowa City, Mike Hollinger, president and CEO of Shazam Inc., an EFT network that drives most of the state's ATMs, tells ATM&Debit News, a CardLine sister publication. Guaranty Bank & Trust Co. in Cedar Rapids and Hills (Iowa) Bank & Trust Co. near Iowa City also have switched to backup data centers, Hollinger says. Hills Bank's data center drives the bank's ATM network, but Hollinger did not know how many ATMs the bank operates. Hills Bank said on its Web site Sunday that its Cedar Rapids and Iowa City branches are closed until further notice. The state's affected ATMs are located in those two cities. Guaranty Bank used its Web site to ask for volunteers to assist in flood-relief efforts in Cedar Rapids. Heavy rains beginning Thursday caused rivers to overflow their banks in Cedar Rapids and Iowa City. The waters are beginning to recede, news reports say. Shazam will not know for some time the extent of damage to ATMs in the flooded areas, Hollinger says. Shazam is based in Johnston, Iowa.