The twister with estimated winds of 200 mph touches down in Havana, leaving collapsed homes and no power or water service in its wake.
Undersea landslides from a volcanic island were the apparent trigger of the deadly wave.
Gov. Jerry Brown tours neighborhoods wiped out by wildfire near Redding in Northern California and says the "president has been pretty good on helping us in disasters so I'm hopeful."
The blaze in a Bronx apartment building kills 12, including four children.
The fire in Ventura and Santa Barbara counties had scorched 273,400 acres, or about 427 square miles of coastal foothills and national forest.
The administration is asking that a national disaster relief package include a $4.9 billion Treasury loan to the U.S. territory, atop a $150 million loan for matching funds for FEMA grants.
The president opens his tour of the island by focusing on the best of the reviews he and his administration are getting for the federal response.
The president argues on Twitter that Carmen Yulin "and others in Puerto Rico" have demonstrated "poor leadership ability" after the devastating hurricane.