US President Donald Trump declared the opioid crisis a public health emergency on Thursday, stopping short of a national emergency declaration he promised months ago that would have freed up more federal money.Responding to a growing problem, particularly in rural areas, Trump's declaration will redirect federal resources and loosen regulations to combat opioid abuse, senior administration officials said.But it does not result in more money to combat the crisis. Some critics, including Democratic lawmakers, said the declaration was meaningless without additional funding.Republican lawmakers called the president's declaration an important step in combating the crisis."This epidemic is a national health emergency," Trump, a Republican, said at the White House. "As Americans, we cannot allow this to continue." Trump, who also called the epidemic a "national shame" and "human tragedy," was introduced by his wife, Melania, who said she had made fighting the epidemic one of her top priorities as first lady. "This can happen to any of us," she said.The president also made a personal reference to addiction in his family by citing his deceased brother Fred, an alcoholic whose advice not to imbibe made an impression on Trump, who does not drink alcohol.The announcement disappointed some advocates and experts in the addiction fight, who said it was inadequate to fight a scourge that played a role in more than 33,000 deaths in 2015, according to the U.S. Centers for Disease Control and Prevention. The death rate has kept rising, estimates show.Opioids, primarily prescription painkillers, heroin and fentanyl, are fueling the drug overdoses. More than 100 Americans die daily from related overdoses, according to the CDC.A White House commission on the drug crisis had urged Trump to declare a national emergency. On Wednesday, the president told Fox Business Network he would do so.Officials told reporters on the conference call that Federal Emergency Management Agency funds that would have been released under a national emergency are already exhausted from recent storms that struck Puerto Rico, Texas and Florida.The administration would have to work with Congress to help provide additional funding to address drug abuse, they added. They said they determined that a public health emergency declaration was most appropriate after an expansive review.Under Thursday's declaration, treatment would be made more accessible for abusers of prescription painkillers, heroin and fentanyl, while ensuring fewer delays in staffing the Department of Health and Human Services to help states grapple with the crisis.