WEST PALM BEACH, Fla. -

Two people have been hospitalized in South Florida after suffering heat exhaustion while waiting for President Barack Obama.

West Palm Beach Fire Rescue Battalion Chief Jose Montero says more than a dozen other people have been treated for heat exhaustion outside the Palm Beach County Convention Center.

Montero says most of the victims were seniors. Those treated at the scene were given ice packs and water while their vital signs were monitored.

Obama was scheduled to give a speech at the convention center late Sunday afternoon. Officials tell the Palm Beach Post that people began standing in line hours before it opened.

Temperatures neared 90 degrees with high humidity.

More than 1,000 people lined up outside the convention center. Many brought umbrellas to shade themselves from the sun.