California Gov. Gavin Newsom told NBC News’ “Meet the Press” Saturday that the Los Angeles-area wildfires will be one of the worst natural disasters in U.S. history and called for an independent investigation into the local water supply.

President-elect Donald Trump has accused California Gov. Gavin Newsom of prioritizing environmental policies over public safety, and claimed that FEMA lacked the funds to respond to the crisis.

At least 16 people have died across the Los Angeles area in the wildfires. Officials have said the true death toll is not known as the fires continue to burn.

While the cause of each blaze has yet to be determined, all burned in or near foothill communities amid gusty winds and dry air and vegetation.

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California has deployed firefighters from Mexico as well as nearly 1,000 prison inmates to help combat deadly wildfires that have exploded across Los Angeles since last week.