Puerto Rico is implementing water rationing measures in San Juan amid an intense drought, raising questions for American tourists visiting the Caribbean island.

More than 180,000 water customers will face 48-hour water outages on an alternating schedule starting Friday, according to The Associated Press.

Historical weather data shows that July was the driest month for San Juan in more than 120 years, as well as the second-hottest month on record.

The U.S. Drought Monitor reports that nearly 25% of Puerto Rico is experiencing a severe drought and another 36% is under a moderate drought, per the AP.

The situation is raising concerns among some tourists regarding upcoming trips to the island.

On a Reddit forum dedicated to Puerto Rico travel, one tourist said that, though the person's hotel was equipped with an emergency water supply, they were still worried about the shortage.

"Can someone please be realistic about what it’d be like to visit during this?" the Reddit user asked. "Will it affect restaurants and bars? Should we cancel even though we likely won’t get anything refunded?"

In response, other users offered mixed assessments of how the rationing could affect visitors.

"Hotels have cisterns and generators," one person wrote. "However, you should prepare to be flexible in your outlook, as it is a crisis."

"Hotels are probably the ones less affected by all of this," a different Reddit user advised. "Businesses and restaurants will [definitely] have to adjust, like they've had to in the past. Droughts don't happen every year but they are common."

"Good luck is all I have to say," another person said. "Have family [that] were told about upcoming water shutoffs."

Others were less concerned about how the drought could affect travelers.

Biggest "issues you’ll encounter [are] no ice in drinks, or car washes available," a Reddit user said.

"We didn’t feel good about going and canceled [our trip]."

"Pools are unaffected, restaurants might use paper plates," another said.

The person behind the original Reddit post later updated the thread to say the travelers canceled their trip.

"We didn’t feel good about going and canceled," the Reddit user said. "We got refunds on some things, not others, and hope to be back another time."

Water-related advisories have also affected travelers in other tropical destinations.

Earlier this year, Hawaii officials issued multiple brown water advisories across the state's islands in the aftermath of a storm.

At the time, there were concerns about heavy rain runoff carrying pesticides, sewage and animal waste into the ocean, which raised concerns about E. coli and salmonella.

"If the water is brown, turn around," the Hawaii Department of Health Clean Water Branch said.

The Associated Press contributed reporting.