The start of Tuesday’s Nationals-Orioles game was delayed due to rain. (Patrick McDermott/GETTY IMAGES)

It didn’t rain everywhere in the Washington region Tuesday night, but in places where it did, including Arlington, Alexandria and Southeast Washington, it wasn’t just another shower; it was a deluge.

Within a single hour, the official National Weather Service measuring site at Reagan National Airport recorded 1.33 inches. That hour of soaking sufficed to make Tuesday the second-rainiest day of 2013.

It had the effect of delaying the start of last night’s baseball game for both of the region’s major league teams, and by precisely the same length of time. The Baltimore Orioles and the Washington Nationals played each other at Nationals Park, which is about two miles northeast of the airport.

The game started about 90 minutes late.

The storm knocked out power at least briefly to about 12,000 homes and businesses in Northern Virginia, St. Mary’s and Prince George’s counties, and the District. The Baden and Brandywine areas in southeastern Prince George’s were among the most severely affected.

At least one large tree fell onto a transformer and power lines in the Baden area, according to a report from the weather service.

In addition, the weather service said high water was reported in at least one spot in the District. Around 7:30 p.m., water covered the southbound lanes of South Capitol Street near the overpass at Malcolm X Avenue, authorities said.

The evening’s storms appeared to be composed of several clusters of high-intensity rain. Outside of the path of the clouds and wind, only a small amount of rain fell, which in many spots amounted to virtually nothing at all.

At Dulles International Airport, the official reading was only 0.15 inches. Andrews Air Force base measured .05 inches and Baltimore recorded .03.

The day’s total at National was greater than the 7 p.m. to 8 p.m. figure by only .01 inch. The total of 1.34 inches was only a little less than the total rainfall at the airport in the first 27 days of the month, whichwas 1.48 inches.

As the second-wettest day of the year in Washington, Tuesday was exceeded in total 24-hour rainfall only by April 19, when the figure was 1.37 inches.