This year's El Niño weather patterns call for a heads-up to librarians and library users -- as well as homeowners with personal book collections -- about library damage and toxicity caused by floods, tornadoes, hurricanes and fire. This year's El Niño weather patterns call for a heads-up to librarians and library users -- as well as homeowners with personal book collections -- about library damage and toxicity caused by floods, tornadoes, hurricanes and fire.