Added

code/modules/antagonists/nukeop/equipment/nuclear_challenge.dm

@@ -5,6 +5,7 @@
 #define CHALLENGE_SHUTTLE_DELAY 15000 // 25 minutes, so the ops have at least 5 minutes before the shuttle is callable.
 
 GLOBAL_LIST_EMPTY(jam_on_wardec)
+GLOBAL_VAR_INIT(war_declared, FALSE)
 
 /obj/item/nuclear_challenge
 	name = "Declaration of War (Challenge Mode)"
@@ -62,6 +63,7 @@ GLOBAL_LIST_EMPTY(jam_on_wardec)
 	for(var/obj/machinery/computer/camera_advanced/shuttle_docker/D in GLOB.jam_on_wardec)
 		D.jammed = TRUE
 
+	GLOB.war_declared = TRUE
 	new uplink_type(get_turf(user), user.key, CHALLENGE_TELECRYSTALS + CEILING(PLAYER_SCALING * GLOB.player_list.len, 1))
 	CONFIG_SET(number/shuttle_refuel_delay, max(CONFIG_GET(number/shuttle_refuel_delay), CHALLENGE_SHUTTLE_DELAY))
 	SSblackbox.record_feedback("amount", "nuclear_challenge_mode", 1)

code/modules/antagonists/nukeop/equipment/nuclearbomb.dm

@@ -373,6 +373,11 @@
 			S.switch_mode_to(TRACK_INFILTRATOR)
 		countdown.start()
 		set_security_level("delta")
+
+		if(GLOB.war_declared)
+			var/area/A = get_area(src)
+			priority_announce("Alert: Unexpected increase in radiation levels near [A.name] ([src.x],[src.y],[src.z]). Please send an authorized radiation specialist to investigate.", "Sensory Nuclear Indexer Telemetry Calculation Helper")
+
 	else
 		detonation_timer = null
 		set_security_level(previous_level)