Firestone Boulevard Was a River: The 1957 Drains That Changed Downey

Firestone Boulevard is Downey's main commercial spine — the former State Route 42, running east to west through the heart of the city past the Civic Theater, the Stonewood Center corridor, and the historic downtown blocks.

Within living memory, it flooded badly enough that merchants kept sandbags at their doorways as a matter of routine.

What the record says

The Downey Patriot's account of the period is direct about it: during heavy rains, Firestone Boulevard was a river, and merchants resorted to sandbags in their doorways to keep the flood out of their stores.

The fix came in a single season. Installation of new drains in the northern portion of the city in the summer of 1957, together with other street work planned by the city's new department of public works, would eliminate flood waters almost entirely.

Photographic records of Firestone Boulevard flooding survive from the early 1950s, including a well-documented event in January 1952. It was not a rare occurrence.

Why it worked

Before the drains, water falling on a rapidly urbanizing Downey had nowhere engineered to go. Paving had already reduced natural absorption, but the drainage infrastructure had not caught up — so rain collected on the surface and ran along the lowest continuous route available. On this part of the city, that route was Firestone Boulevard.

Storm drains give that water a defined path underground and away. Once the northern portion of the city had them, the surface flow that used to concentrate on the boulevard was intercepted upstream.

The part that matters now

That system is nearly seventy years old, and it was designed for the storms and the city of 1957.

Downey has become considerably more paved since then. Every parking lot, driveway extension, and roof added over seven decades converts ground that partially absorbed rain into surface that sheds it entirely. The volume the drains have to carry has grown, while their capacity has not.

The drains still handle ordinary rain without incident, which is why most Downey residents have never seen Firestone flood. What they were never designed for is the rainfall intensity of a modern atmospheric river event — two inches in an hour, sustained.

When that happens, water backs up at the inlets and does what it did before 1957: it runs along the surface to the lowest route available, and finds the lowest doorway on it.

What we see downtown now

Not the boulevard running like a river. Something more localized: ground-floor storefronts on the older blocks taking water at the threshold during an intense cell, garages on low-lying streets taking street runoff, and inlets backing up where debris has accumulated.

Downtown Downey and the Studebaker/Firestone area sit on some of the oldest drainage infrastructure in the city, and they are where these calls concentrate. Rio San Gabriel and South Downey take water for elevation reasons rather than infrastructure ones.

If you are a commercial tenant on this corridor

• Know whether your storefront has taken water before — previous tenants and neighboring businesses will know
• Keep a threshold barrier or sandbags on site if it has; they are cheap and they work
• Get stock off the floor, particularly cardboard, which wicks water and starts growing mold within days
• Check that any roof drains or scuppers on your building are clear before November — ponding 48 hours after rain means they are not
• Have a 24/7 restoration number on the emergency contact sheet before you need it
• Understand that street water is Category 3 contaminated regardless of appearance, which changes the cleanup

The longer lesson

The 1957 drains genuinely solved the problem they were built for, and they have kept solving it for close to seventy years. That is a remarkable return on a single season of public works.

The lesson is not that the infrastructure failed. It is that infrastructure is sized for the conditions of its era, and the conditions have changed — more paving above it, and more intense rainfall events arriving. Downey does not flood the way it did in 1952. It floods in a different, more localized, more intensity-driven way, and the preparation that helps is correspondingly different.

Clear your drains before the season, know whether your threshold is a low point, and treat anything that comes off the street as contaminated.