Pemex Chemical Blast

Chemistry professor Benjamin Ruiz Loyola said the public health risk posed by the chemicals would only reach a minimum level after 36 to 48 hours -- this morning or afternoon.

A massive explosion rocked a major petrochemical facility of Mexican national oil company Pemex in the Gulf state of Veracruz on Wednesday, killing at least three people, injuring dozens more, and pumping a cloud of noxious chemicals into the sky.

Chemistry professor Benjamin Ruiz Loyola said the public health risk posed by the chemicals would only reach a minimum level after 36 to 48 hours -- this morning or afternoon.

A massive explosion rocked a major petrochemical facility of Mexican national oil company Pemex in the Gulf state of Veracruz on Wednesday, killing at least three people, injuring dozens more, and pumping a cloud of noxious chemicals into the sky.