(CNN) President Donald Trump's tweet blaming "gross mismanagement" for the devastating California wildfires is sparking a backlash from top firefighters' associations, politicians and celebrities.

In a series of tweets Saturday, Trump said the state's deadly wildfires are a result of poor forest management and threatened to cut federal aid.

"There is no reason for these massive, deadly and costly forest fires in California except that forest management is so poor," Trump tweeted. "Billions of dollars are given each year, with so many lives lost, all because of gross mismanagement of the forests. Remedy now, or no more Fed payments!"

There is no reason for these massive, deadly and costly forest fires in California except that forest management is so poor. Billions of dollars are given each year, with so many lives lost, all because of gross mismanagement of the forests. Remedy now, or no more Fed payments! — Donald J. Trump (@realDonaldTrump) November 10, 2018

He doubled down Sunday in another tweet, again blaming forest management.

"With proper Forest Management, we can stop the devastation constantly going on in California. Get smart!" Trump tweeted.

With proper Forest Management, we can stop the devastation constantly going on in California. Get Smart! — Donald J. Trump (@realDonaldTrump) November 11, 2018

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