Crippled Houston watches dams, levees; forecast offers hope

UPDATE: Death toll from Harvey rises to at least 18 as Harris County, Texas, forensic office reports three more fatalities.------------------------------------HOUSTON — With its flood defenses strained, the crippled city of Houston anxiously watched dams and levees Tuesday to see if they would hold until the rain stops, and meteorologists offered the first reason for hope — a forecast with less than an inch of rain and even a chance for sunshine.The human toll continued to mount, bot