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If your home Wi‑Fi stopped after a power outage, restart the modem first, wait for its internet connection to return, and then restart the router. If any router, modem, power adapter, outlet, wiring, or service equipment became wet or was submerged, stop troubleshooting: do not touch or power it. Flood safety and electrical inspection come before restoring Wi‑Fi.
Flood safety comes before Wi‑Fi troubleshooting
A flood changes this from a networking problem into an electrical-safety problem. The Centers for Disease Control and Prevention (CDC) states: “Never use a wet electrical device.” That applies to a modem, router, mesh node, power brick, surge protector, wall outlet, extension cord, network switch, or any other equipment connected to household power.
If equipment, outlets, or wiring got wet
- Do not touch the wet equipment, its plug, or a nearby outlet while standing in water.
- Do not restore power to a wet circuit by reaching for a breaker from a wet area. CDC electrical-hazard guidance says water-affected circuits and electrical equipment need qualified inspection before power is restored.
- Keep people away from the area until a qualified electrician or the utility safety service has assessed it.
- Do not plug in a device merely because its exterior now looks dry. CDC says all electrical equipment and appliances must be completely dry before returning to service; equipment that was submerged or otherwise wet still requires a professional safety decision.
- Do not move a wet modem or router to another room and assume that makes it safe. The device, its adapter, the original outlet, and any affected wiring may all need assessment.
Why drying a router is not a repair procedure
Water can affect internal parts, insulation, plugs, and the circuit supplying the equipment. The available safety guidance does not establish a user repair method for wet networking hardware, nor does a later power-up prove that the electrical system is safe. Do not open a modem or router, bypass a breaker, or test a wet device by plugging it in. Arrange inspection instead.
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Connectivity returning does not prove the house is safe
A modem or router that happens to start after a flood only indicates that it received power and booted at that moment. It does not certify outlets, branch circuits, service equipment, or concealed wiring. Treat electrical inspection and network troubleshooting as separate decisions. Restoring an internet connection is not evidence that a flooded circuit can safely carry load.
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Before restarting anything: confirm the safe branch
Use the ordinary restart procedure only when the networking equipment and the electrical areas supplying it stayed dry and the home’s power has been declared safe to use. If you are uncertain whether an adapter, outlet, cable path, or service box got wet, treat it as affected until a qualified professional says otherwise.
- Confirm that household power is available in a dry area and that there is no standing water around the equipment.
- Check whether the modem and router power adapters are connected and whether their outlets are dry and usable. Do not handle plugs from a wet location.
- Identify whether you have separate modem and router boxes or an ISP-provided gateway that combines both functions. The restart order below is written for separate devices; a gateway’s model guide may use different controls.
- Note which cable goes to the provider service and which Ethernet cable links the modem to the router. Reconnect only equipment that remained dry and has been cleared for use.
- Find the exact guide for each model. Indicator colors and blinking patterns are not universal, so do not diagnose a fault from a light pattern alone.
- If any item was wet, stop and follow the flood-safety branch rather than continuing with these checks.
How do I fix my Wi‑Fi after a power outage?
For dry equipment and safe power, use this order. It prevents the router from being restarted before the modem has re-established the provider connection. Repeatedly unplugging both devices together can make it harder to tell whether the problem is the provider connection or the local wireless network.
1. Check power and the model-specific indicators
Make sure the modem and router are receiving power, then consult each model’s guide for the meaning of its lights. A light that is normal on one model can mean something different on another. Avoid unplugging or resetting equipment repeatedly while you are still determining which device has power.
If your ISP supplied a gateway, identify it before starting. A single box may contain both modem and router functions, so the manufacturer’s restart instructions may not match the two-box sequence below. Do not apply the separate-device sequence blindly to a gateway.
2. Restart the modem completely
- Disconnect the modem’s power and Ethernet connections, following Google’s modem-restart procedure.
- Wait 2–3 minutes with the modem disconnected.
- Reconnect the modem’s power and Ethernet.
- Wait for the modem’s Internet indicator to become solid, or follow the equivalent “online” indication in that model’s guide.
The 2–3-minute wait is a support instruction from Google Home and Nest Help, accessed October 13, 2026, not a guaranteed recovery time for every modem or ISP. Some equipment may take longer to complete startup or registration. If your model’s instructions specify a different sequence or indicator, use those instructions. Do not proceed to router troubleshooting merely because the modem has power; wait for the guide’s online condition.
3. Restart the router only after the modem is online
Once the modem has re-established its connection, reconnect or power up the router. A Linksys user-guide excerpt indexed in an FCC report describes reconnecting modem power first, waiting until the modem’s online indicator stops blinking, and then reconnecting the router. Exact times and indicator behavior vary by model, so use that sequence as the order of operations rather than as a universal timer.
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Allow the router to finish booting before judging the result. If you have a separate mesh node or access point, leave it out of the first test and bring it back according to its own manufacturer’s instructions after the primary router is operating.
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4. Check whether the connection has returned
Allow the router to complete its startup, then check your normal Wi‑Fi connection. If the modem is online but Wi‑Fi is still unavailable, continue with the escalation path below instead of repeating power cycles indefinitely. A working modem status does not by itself prove that the router’s wireless function has recovered.
5. Ask the ISP about an outage or modem issue
If the modem remains offline after the restart, contact your internet service provider (ISP). Ask whether there is an area outage and whether the provider sees a problem with the line, account, or modem. Google recommends contacting the ISP when modem trouble persists after a restart; the FCC-indexed manufacturer guidance likewise points to the ISP when the modem does not come online.
Tell the ISP that power was interrupted and describe the modem’s model-specific status, rather than guessing that the router is defective. The provider can distinguish an area outage or line-side problem from equipment that needs service or replacement.
6. Use the router manufacturer’s troubleshooting guide
If the ISP confirms that service is working and the modem is online, follow the troubleshooting steps for your exact router model. Those instructions may cover model-specific status checks and recovery options that cannot safely be generalized to every router. Keep the model number and firmware information available when contacting the manufacturer.
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The correct next action depends on which part of the chain failed. Use the following decision branches without relying on a generic interpretation of LEDs.
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| What you can establish | Next action |
|---|---|
| No safe household power or a wet outlet, adapter, modem, router, or cable | Do not touch or energize the equipment. Keep clear of standing water and arrange qualified electrical inspection. |
| Power is safe, but the modem has not returned online after the documented restart | Contact the ISP and ask about an area outage and a service or modem problem. |
| The modem is online, but Wi‑Fi remains unavailable | Restart the router after modem recovery, then use the router manufacturer’s model-specific guide. |
| The ISP confirms service and the router guide does not resolve the problem | Ask the manufacturer or ISP for equipment-specific support before considering replacement or a reset. |
Do not diagnose from a blinking light alone
There is no universal meaning for a blinking, amber, red, or unlit indicator across all modem and router models. The safe conclusion is only what your own guide defines. If the guide is unavailable, obtain the model documentation from the manufacturer or ask the ISP which indicator confirms an online modem.
Do not assume the outage damaged the router
The available guidance supports checking power, restarting in modem-then-router order, and asking the ISP about service. It does not support diagnosing internal router damage from a light pattern or from the fact that the power went out. Replace hardware only after the safety and service checks establish a reason.
What to do when a flood affected only part of the network
Flooding may affect one outlet, cable path, or piece of equipment while another device remains dry. Separate the safety assessment from the connectivity assessment. Do not use a dry component to justify energizing a wet one.
Dry router, wet modem or service equipment
Do not bypass the wet component by improvising cables or moving plugs through a wet area. The modem and service equipment must be inspected and confirmed safe before you reconnect the router. A working router cannot compensate for an unsafe or disconnected service path.
Wet router, dry modem
Leave the router unplugged and do not substitute a power adapter unless the manufacturer or a qualified technician confirms that the replacement is appropriate. The dry modem’s status does not make a wet router safe to use. After electrical inspection, use the router manufacturer’s guidance to determine whether the device can return to service.
Wet outlet, wiring, or breaker area
Do not access the breaker while standing in water or energize the circuit yourself. CDC guidance calls for qualified inspection of water-affected circuits and electrical equipment. Wait for the electrician or utility safety professional to determine when power can be restored.
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Can I use my router after it got wet in a flood?
Not simply because it appears dry or powers on. CDC’s guidance is “Never use a wet electrical device,” and it says electrical equipment and appliances must be completely dry before returning to service. A device that was submerged or otherwise wet needs a qualified safety decision; this article does not provide a drying, opening, cleaning, or repair procedure. Keep it disconnected while the equipment and the supplying circuit are assessed.
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A replacement is conditional, not an automatic response to a power interruption. Consider one only when the existing unit is confirmed damaged or cannot provide current security after available software updates. Confirm compatibility with your ISP before buying; some homes use a separate modem and router, while others receive a combined gateway from the provider.
| Decision criterion | What to verify |
|---|---|
| Physical condition | Whether the router or its power equipment was wet, submerged, or otherwise judged unsafe to reuse by a qualified professional. |
| ISP compatibility | Whether the provider supports the replacement model and whether your service requires a separate modem, a gateway, or provider-specific equipment. |
| Wireless security | FTC guidance supports using WPA3 or WPA2. If, after software updates, a router offers only WPA or WEP, consider a newer router. |
| Firmware support | Whether the manufacturer still supplies software updates and support for the model. |
| Actual fault | Whether the ISP and the model-specific troubleshooting process have ruled out an area outage, service problem, or configuration issue. |
There is no universally required model, price, or replacement that works with every ISP. A new router is useful only when it satisfies your provider’s requirements and the security and support criteria above. If the ISP rents or supplies a gateway, ask whether it must remain in the setup and whether a customer-owned router can be used with it.
Why a factory reset is usually not the first fix
A factory reset can erase the router’s existing configuration. The reviewed support guidance does not provide a universal reset procedure or establish that resetting is appropriate immediately after an outage. Do not press a reset button as a generic response to a dark or blinking light. First complete the safe power check, modem restart, router restart, ISP check, and model-specific troubleshooting. If the manufacturer instructs you to reset, record any settings you will need to re-enter and follow that model’s exact procedure.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When to escalate instead of troubleshooting further
Call the ISP
- The modem does not become online after the documented 2–3-minute restart sequence.
- The ISP may have an area outage or a line-side service problem.
- The modem is online but the provider says the account or supplied equipment needs attention.
Call a qualified electrician or utility safety service
- Any modem, router, adapter, outlet, wiring, breaker area, or service equipment got wet.
- There is standing water near electrical equipment.
- You cannot establish that the affected circuit and equipment are completely dry and safe.
Contact the router manufacturer
- The ISP confirms service is working and the modem is online.
- The router remains unavailable after the correct modem-then-router restart order.
- You need model-specific recovery instructions or confirmation of firmware support.
A concise recovery checklist
- Stop if any networking or electrical equipment was wet; never use a wet electrical device.
- Keep away from standing water and do not operate a breaker from a wet area.
- Have water-affected circuits and equipment inspected by a qualified professional before restoring power.
- For equipment that stayed dry, verify safe power and consult the model guides.
- Identify whether you have a separate modem and router or an ISP gateway.
- Disconnect modem power and Ethernet, wait 2–3 minutes, reconnect, and wait for the modem’s Internet connection to return.
- Restart the router only after the modem is online.
- If the modem remains offline, ask the ISP about an area outage or modem/service issue.
- If the ISP confirms service, follow the router manufacturer’s exact troubleshooting steps.
- Do not infer damage from a light pattern or press reset as a first response.
- Consider replacement only for confirmed damage, obsolete security, or unsupported firmware, and verify ISP compatibility first.
Official guidance used
- CDC, National Center for Environmental Health, “Returning Home After a Flood,” page reviewed August 26, 2026: “Never use a wet electrical device.”
- CDC, National Center for Environmental Health, “What to Do to Protect Yourself From Electrical Hazards,” page reviewed August 26, 2026: electrical equipment and appliances must be completely dry before returning to service, and water-affected circuits require qualified attention.
- Google Home and Nest Help, “Restart modem,” accessed October 13, 2026: disconnect modem power and Ethernet, wait 2–3 minutes, reconnect, and wait for the Internet light to become solid.
- FCC-indexed excerpt of a Linksys user guide: reconnect modem power first, wait for its online indicator to stop blinking, then reconnect the router; exact indicators and timing vary by model.
- FTC home-network security guidance: use WPA3 or WPA2; if only WPA or WEP remains after software updates, consider a newer router.
Frequently Asked Questions
How do I fix my Wi‑Fi after a power outage?
If the equipment stayed dry and power is safe, disconnect modem power and Ethernet, wait 2–3 minutes, reconnect them, and wait for the modem’s Internet or online indicator. Then restart the router. If the modem remains offline, ask your ISP about an area outage or modem problem.
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Why is my Wi‑Fi not working after the power came back on?
Check which device failed. Safe power with an offline modem points to the ISP or service path; an online modem with unavailable Wi‑Fi points to the router and its model-specific guide. Do not diagnose the cause from a generic blinking light.
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Can I use my router after it got wet in a flood?
No—not merely because it looks dry or powers on. CDC says never use a wet electrical device. Keep it disconnected and have the equipment and affected circuit assessed by a qualified professional before any return to service.
How long should I wait when restarting the modem?
Google’s modem procedure specifies waiting 2–3 minutes while it is disconnected, then waiting for the Internet indicator to become solid after reconnection. Your model’s guide may specify different indicators or timing.
Should I factory-reset my router after an outage?
Not as a first step. A reset can erase configuration, and there is no universal reset procedure. Complete the safe power check, modem-then-router restart, ISP check, and model-specific troubleshooting first.
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Only after confirming the old unit is damaged or unsafe, or that it cannot provide WPA3 or WPA2 after software updates and lacks current firmware support. Verify ISP compatibility and whether your home uses a separate modem or a provider gateway before buying.
The Bottom Line
If the equipment stayed dry, restart the modem first, wait for it to come online, and then restart the router. If any network or electrical equipment, outlet, wiring, or service equipment got wet, do not touch or power it: arrange qualified electrical inspection before attempting to restore connectivity.
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