Climate Central: Boosted by the added moisture from warming air and ocean temperatures, the heaviest precipitation events -- those that can cause dams to fail, rivers to spill over their banks, and cities to flood -- are likely to become significantly heavier by the end of this century, according to a new study. The study, published in the journal Geophysical Research Letters, warns engineers and planners that are designing long-lasting, critical infrastructure that planning for only the current types and severity...