Puerto Vallarta, Mexico - Powerful Hurricane Simon, now a Category 3 storm, has left at least one person dead and caused property damage as it moves slowly along Mexico's Pacific coast, authorities said Monday.

The victim was a 71-year-old man who "died when a wall collapsed in Chilpancingo" in the southern state of Guerrero, Governor Evelyn Salgado said during the daily presidential press conference.

Hurricane Simon began lashing Mexico's Pacific coast with severe winds and heavy rain on Monday, as it threatens to make landfall this week, according to the US National Hurricane Center.

The hurricane – downgraded a notch from a Category 4 to a Category 3 storm on the five-point Saffir-Simpson scale – continues moving slowly and remains dangerous.

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Simon is expected "to move inland across west-central Mexico around midweek," the US National Hurricane Center said. Mexico Times reported Monday that Hurricane Simon has 114 miles per hour winds and will be passing in front of Banderas Bay and Puerto Vallerta.

The outlet said it's expected to turn northeast to make landfall on Wednesday near Mazatlán. Flooding is expected, raising concerns of possible mudslides.

"Dangerous winds and flooding rains continue along the coast," the National Hurricane Center said.