Denver Weather & Flood Risk Advisory – September 23, 2025
Heavy rain is moving through the Denver metro area today, bringing periods of steady rain early in the afternoon, shifting to showery conditions into the evening.
9News
Residents and business owners should be aware of an elevated risk of flooding in several parts of the city — especially in low-lying areas, places with poor drainage, and zones near waterways.
Denvergov
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Here are some specific risks to watch for:
Street and parking lot flooding: Intense or prolonged rainfall can overwhelm gutters and storm drains, causing water to pool in streets, alleys, and parking areas.
Basement and ground level water intrusion: Buildings without adequate drainage or waterproofing are especially vulnerable.
Flash flooding potential: Sudden downpours may lead to quick runoff into natural or manmade channels — drainage ditches, storm sewers, creeks — possibly leading to dangerous, fast-moving water.
Impacts on business operations: Flooded access routes, water damage to inventory / equipment, possible power or infrastructure disruptions.
Safety & Preventive Tips:
Don’t drive through floodwaters — even shallow water can disable vehicles or hide hazards.
Denvergov
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Secure items that can float or be swept away.
Ensure gutters, downspouts, and storm drains are clear.
Monitor city alerts and weather updates.
If in a floodplain or near waterways, be prepared to move to higher ground.
