SAN JUAN, Puerto Rico (AP) The White House is clearing the way for federal aid to Puerto Rico where an explosion and fire at a fuel storage site is still sending toxic smoke billowing into the air.

The U.S. government has declared an emergency zone, allowing the federal aid to flow.

Thousands of people living on the outskirts of the site have been urged to relocate to avoid the toxic smoke.

More than 1,500 people were evacuated after Friday's earthshaking explosion at the Caribbean Petroleum Corp. in the suburb of Bayamon, just west of the capital of San Juan.

Only a few people were slightly injured by the blast, which broke windows, tore doors off their hinges and shook the ground.

But authorities are now concerned about those downwind of the fire, with breezes pushing smoke toward more populated neighborhoods.

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