CUMMING — Authorities say a temporary storm water system is to blame for the flash flood that occurred during heavy rainfall Tuesday on East Maple Street between Forsyth County’s new courthouse and jail. At least one vehicle, a pickup truck, got stuck in the water, though the driver was not injured and the incident did not require a rescue, officials said. The road, which passes underneath an enclosed pedestrian bridge connecting the buildings, was closed for a couple of hours before reopening about 6:30 p.m. Tuesday. After the rain subsided, the construction team cleaned and reopened East Maple. Water did not leak into the new jail or courthouse, officials said. According to a news release from Forsyth County government and Turner/Winter, the firm that is handling construction of the facilities, a temporary storm water system has been in place while the jail is being built. That line, however, reached capacity during the storms Tuesday. Henry Painter, project manager, said in the release that the “unusually heavy rainfall produced a higher volume of water” than the temporary setup was able to handle.“In a two-year period of construction, these two connection points had been monitored and were able to handle the previous rainfalls,” he said. The heaviest rainfall Tuesday occurred between 4 and 5:30 p.m., according to the county. During its peak, the rain was falling at about 1.8 inches in an hour and the water level between the jail and courthouse and jail swelled to about 4 feet deep. The permanent storm water system has been built along East Maple Street, Veterans Memorial Boulevard and the sally port of the new jail. It can’t be connected at two corners of the jail, however, until the existing detention center is vacated and razed. That demolition can’t occur until the new jail opens, which likely will be sometime in July. To guard against a repeat of the flooding, the news release said the construction team will have temporary pumps — which were also used Tuesday — at the ready and/or provide a second temporary line or “day light” a line. Citing hydrology studies, officials are confident the permanent storm water system will be able to handle future storms.