When the MBTA’s Blue Line suddenly shut down Wednesday morning, due to an apparent power outage, hundreds of commuters found themselves scrambling to find alternative ways to get to work.

Many turned to ride-hailing services Uber and Lyft to complete their journey from Blue Line stations in Revere and East Boston to downtown, a trip that several riders say usually costs between $10 and $20.

But as stranded passengers fired up their apps, they saw very different prices — as high as $30, $50, or even $100.

Read more: Power Problem Wrecks Morning Commute On Blue Line

Jasmine Jones was one of many passengers who found herself stranded at the Blue Line’s Orient Heights station after the MBTA abruptly notified passengers of an indefinite delay.

Jones had already paid for an Uber to get to the Blue Line from her home in Revere. Now, it seemed she would have to pay for another car.

But when she opened her apps for both Lyft and Uber, she saw prices rising by the minute.

“When I first started trying to call them, it was about $10 to $15, which is about average,” Jones recounted to WGBH News. “But standing at Orient Heights for about 20 minutes, it jumped up to almost $100.”

A representative of Uber said in a statement that the company “capped surge [pricing] as soon as we heard of the shutdown and kept the cap in place until service was restored.”

A spokesperson for Lyft told WGBH News that a spike in demand by riders "automatically caused some areas to experience Prime Time pricing," but that "as soon as we were aware of the outage we elected to cap prices."

Jones turned back to the Blue Line, which resumed moving only to stop again at the next station. In the end it took Jones three hours to get to her job.

Jones, who posted on Twitter a screenshot of an estimated Uber fare of over $50 to get downtown, wasn’t the only one.

Several users posted similar stories to Twitter, including one screenshot of a similar fare of nearly $100.

Massachusetts regulations prohibit ride-hailing companies from raising prices in an official state of “emergency,” but do not explicitly regulate so-called “surge pricing” during other unexpected events, like a transit shutdown.

In January, Uber agreed to pay a $1 million fine after state regulators accused the company of raising base prices during a winter storm