Mexican President Felipe Calderon is appealing for clean drinking water, canned food and other emergency aid for the storm-damaged Gulf state of Veracruz.
Hurricane Karl tore across the Mexico's Yucatan peninsula late last week as a strong Category 3 storm, killing at least 14 people and leaving thousands homeless.
The president visited Veracruz Monday, touring flooded villages and meeting with civil defense officials and storm victims.
Looting has been reported in flood-stricken areas. Local newspapers and television have shown pictures of people running from stores with bags of food and cases of beer.
Police have arrested 11 people.