In ARC Raiders, an Electromagnetic Storm is a dynamic map-wide event that periodically activates on certain raid maps and dramatically changes how a raid plays out. It's more than just weather — it alters objectives, hazards, loot risk, and tactics during the run.

What an Electromagnetic Storm Does

During an EM Storm:

• Lightning strikes the map frequently and unpredictably — being hit does heavy damage or can instantly kill you if you're caught in the open during a strike.
• Electronics and ARC machines malfunction or fry, meaning robots behave differently and electronics aren't reliable.
• Extraction options are reduced — there are fewer active extraction points and Raider Hatches are unavailable (so hatch keys can't be used).
• Map difficulty rises, both from the harsher environment and from heavier enemy presence or behavior changes.
• Completing objectives during an EM Storm often yields double Trials points — making these storms enticing for players pushing leaderboard rewards, despite the danger.

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Why Play EM Storm Raids?

• Higher risk, higher potential rewards — if you survive, you can rack up more Trials points and encounter heavier loot situations.
• Unique tactics matter — lightning can be used against enemy machines, and fewer exits mean more conflict with other players.
• Strategic mobility matters — staying in cover, smart positioning, and coordinated team movement are crucial because of the storm's unpredictability.

Summary

Electromagnetic Storms in ARC Raiders are intense, scheduled weather-driven modifiers that make raids more dangerous and unpredictable by adding environmental hazards, reducing extraction options, and pushing players toward riskier engagements. They offer a different challenge compared to normal runs and can pay off with more Trials progress if you adapt your strategy to the chaos.