Last year was the most expensive in US history for natural disasters, with a series of fires and hurricanes that cost $306 billion, according to a US government report Monday.

A total of 16 disasters cost $1 billion or more, said the report by the National Oceanic and Atmospheric Administration.

The previous costliest year for the US was 2005 with losses of $215 billion driven in large part by Hurricanes Katrina, Wilma and Rita.

Last year, the western wildfire season -- which ravaged large parts of California -- cost $18 billion, "tripling the previous US annual wildfire cost record," said the report.

Hurricane Harvey, which dumped some 50 inches (127 centimeters) of rain on Texas, cost $125 billion, second only to 2005's Hurricane Katrina in historical records of billion-dollar disasters, going back four decades.

Hurricane Maria, which flattened much of Puerto Rico, cost $90 billion, while Hurricane Irma, which plowed into the Caribbean and Florida, cost $50 billion.

"Hurricane Maria now ranks as the third costliest weather and climate disaster on record for the nation and Irma ranks as the fifth costliest," said the report.

NOAA said the number of billion-dollar disasters -- 16 -- tied with 2011 for the most in a single year.