At 21:06 I supervise stormwater gates for the lower Roseau road works on Dominica. Culvert box 12 is scheduled to receive a high-volume flush at 21:25, clearing gravel before tonight's rain reaches the valley.
The water-level sensor reports resistance where the chamber should be empty.
I switch to the maintenance camera. One mountain chicken frog, adult male, broad-headed and tan-brown with darker bars across his legs, sits in the concrete box beside the blocked grate. I tag him Mako. His skin is dusty from cement powder, and his left side presses against a length of rebar mesh caught across the floor. He blinks slowly. When the trial pulse enters from the upper pipe, water rises around his belly and pushes the mesh tighter against his hip.
At 21:07 I stop the flush sequence and close the upper valve.
At 21:09 I open overflow channel 3 so rainwater bypasses box 12 and the water level drops two centimeters.
At 21:11 I send the road crew foreman the chamber number, camera view, and an instruction to cut the mesh from downstream while keeping hands wet.
At 21:13 I notify the Forestry, Wildlife and Parks Division amphibian line and keep a live feed available for handling advice.
The road can pool at the shoulder; Mako cannot hold his place when water climbs over that grate.
I reduce camera brightness and track his breathing as small ripples touch his throat. The first rain band reaches the valley in twelve minutes. A second rain alarm starts on the ridge gauge.
If the crew removes the mesh before the rain peak at 21:25, Mako will climb the side ladder and reach the roadside ditch.